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Inquiry Article

Women'due south Preferences for Penis Size: A New Research Method Using Pick among 3D Models

• Nicole Prause,
• Jaymie Park,
• Shannon Leung,
• Geoffrey Miller

ten

• Published: September ii, 2015
• https://doi.org/10.1371/journal.pone.0133079

Figures

Abstruse

Women's preferences for penis size may affect men's condolement with their own bodies and may have implications for sexual health. Studies of women's penis size preferences typically take relied on their abstruse ratings or selecting amidst 2nd, flaccid images. This written report used haptic stimuli to allow assessment of women'south size recall accuracy for the first time, as well as examine their preferences for erect penis sizes in different human relationship contexts. Women (N = 75) selected amongst 33, 3D models. Women recalled model size accurately using this method, although they fabricated more errors with respect to penis length than circumference. Women preferred a penis of slightly larger circumference and length for one-time (length = 6.4 inches/16.three cm, circumference = five.0 inches/12.7 cm) versus long-term (length = six.3 inches/16.0 cm, circumference = iv.8 inches/12.2 cm) sexual partners. These get-go estimates of erect penis size preferences using 3D models suggest women accurately call up size and prefer penises only slightly larger than average.

Citation: Prause N, Park J, Leung S, Miller G (2015) Women'southward Preferences for Penis Size: A New Research Method Using Choice among 3D Models. PLoS I 10(9): e0133079. https://doi.org/10.1371/periodical.pone.0133079

Editor: Heather Hoffmann, Knox Higher, Us

Received: February 11, 2015; Accepted: June 22, 2015; Published: September 2, 2015

Copyright: © 2015 Prause et al. This is an open up access commodity distributed under the terms of the Creative Eatables Attribution License, which permits unrestricted apply, distribution, and reproduction in whatever medium, provided the original author and source are credited

Data Availability: All relevant data are available via Figshare (http://dx.doi.org/10.6084/m9.figshare.1466782).

Funding: These authors take no support or funding to study.

Competing interests: The authors have declared that no competing interests exist.

Introduction

Both men and women often have reported discomfort with the appearance of their genitals. While not as common of a concern as body weight, muscularity, corporeality of head hair and body hair, or superlative, penis size was a business concern for 68.3% of 200 men in one study [1]. Concerns about genital advent are unique compared to other concerns virtually physical appearance. Get-go, only intimate partners generally know the appearance of genitals. In contrast to the penis, body weight, acne, and other features are easily observed, informing feelings of attraction early in interactions. While indicators of penis size include ethnicity [2] and finger length and ratio [three, 4], about proposed cues of penis size, including male superlative and human foot size [five], weight [6, seven], shoe size [viii], and age [ix], are unreliable. 2nd, no nutrition, pill, or exercise authorities affects the size or shape of genitals. However, about one-half of men in one study believed that they could change their penis size through not-surgical means [10]. Little can be done to alter the appearance of the penis. Reverse to some public opinion, it also is worth noting that discomfort with the appearance of the penis is not impacted [xi], or is positively impacted [12], by viewing sex activity films. Given that simply intimate partner(south) view the penis, the appearance is relatively immutable, and sex films are not causing dissatisfaction, partner perceptions of the penis appearance seem to most likely to impact men's feelings well-nigh the features of their penis.

The expectations that men take about women'due south penis size preferences announced to drive anxiety and dissatisfaction more than than some inborn dissatisfaction. In the first questionnaire to examine the nature of dissatisfaction with the penis direct, three of the ten items concerned a partner's perception [thirteen]. These included "I will exist alone and without a partner" and "I will be laughed at past a partner in a sexual situation". These anxieties may be unnecessary. For example, while men and women agreed that the "ideal" penis length was longer than what they thought was average, men mistakenly reported that women would observe an even longer penis platonic than the women really did [10]. Furthermore, most men seeking surgery to increase their penis size (e.g., [14, xv]), actually fall within the normal penis size range [16].

Concerns most penis size touch on men's sexual satisfaction and functioning. Of course, penis size need not touch on sexual functions like orgasm, sexual bulldoze, or pain experience. However, men who are less satisfied with their penis report more than sexual wellness bug [17]. A smaller penis decreases sexual conviction [xviii], which may be why penis size is related to sexual function. Another reason penis size may be related to sexual performance is that anxiety concerning the partner'south response may be calculated as a cost of the relationship, which leads him to experience broad sexual dissatisfaction [19].

The context of the sexual relationship could influence penis size preferences. For case, the goal of the sexual interaction with a one-night partner tends to be pleasure [xx]. Women recognize that infection risks are higher from a ane-nighttime partner [21]. While women conform their behaviors for this risk, being less likely to engage in anal sex [22] and more likely to use condoms [23] with one-nighttime partners, such risky behaviors themselves are ofttimes experienced every bit pleasurable [24]. On the other manus, vaginal intercourse always causes tears in the vaginal mucosa [25] peculiarly in the sensitive posterior fourchette [26], then women might prefer a smaller penis less probable to stress their physiology for regular, long-term mates. Thus, women might shift their preferences for penis size depending on the type and duration of sexual relationship.

Studies of penis size preference to date have relied on numerical size estimates, vague qualitative descriptions, or two-D line drawings. For example, some studies have asked participants to specify penis length preferences in centimeters [27]. Another study asked participants to bespeak their preference from reading erotic passages with three qualitative penis size options (small, medium, large) [28]. All the same, humans judge sizes most accurately when visual and haptic data are available together [29]. Both sources of information are usually available in sexual interactions. Thus, in this report, three-dimensional (3D) models were used with the hope of increasing accuracy, ecological validity, and external validity. Also, almost studies of penis size preference take portrayed or asked about the penis in its flaccid country [thirty, 31]. This may be problematic, because the human relationship between erect and flaccid sizes has been reported every bit negligible [32, 33] moderate (r = .44 in [34], r = .78 in [35]), and strong (rho = .77 in [6], r = .79 in [32]). It is unclear how well flaccid size reflects cock size. Of course, intercourse can occur only with a sufficiently rigid penis [36]. Thus, information technology seemed important to narrate preferences for penis size in its erect state. The electric current study used 3D models of erect phalluses to characterize women's penis size preferences for the first time.

Three-dimensional (3D) press is just beginning to be used to assess shape perception and categorization. On the i hand, visual 2nd data every bit compared to haptic information (from 3D) event in like solutions for object similarity [37]. Each way of information (visual or haptic) also improves categorization in the other domain [38, 39]. 3D press could allow representation of highly problem-specific, circuitous structures [39]. Haptic data from 3D objects improved shape identification compared to raised lines lone [xl] and improves later performance in the visual domain [41], possibly past improving discriminability [42]. As well, haptic information is robust to differences in perceptual acuity, such as occur with aging [43], which make such stimuli attractive when the visual acuity of participants may vary. This study extends the existing work using 3D stimuli to appraise size preferences. This arroyo too permitted characterization of women's ability to accurately call up the size of erect phallus models for the first fourth dimension.

When flaccid and "stretched" penis sizes are characterized [44], largely past cocky-measurement [45], they predict cock size surprisingly poorly. Withal there are relatively few studies of erect penis size. This may reflect cultural taboos against researchers or doctors interacting with men who are in a sexually angry state. I study had men guess their own cock size in relation to a banknote's length [46]. Two studies of erect penis sizes provided kits for home measurement [47, 48]. Such self-measurements of length and circumference show fairly skillful examination-retest reliability (r = .68 to .xc, [47]). Pharmacologically-induced, md-measured erections identified an boilerplate length of 12.89 cm (SD = ii.91) and circumference of 12.3 cm (SD = ii.ix; [32]). These were somewhat shorter in length (K = 14.fifteen, SD = ii.vii), still like in circumference (M = 12.23, SD = ii.2), compared to a recent, big survey [48].

Women's penis preferences may vary with their relationship expectations. Women prefer more masculine partners for shorter-term sexual relationships [20]. Women also value intelligence more than, and bewitchery less, for long term, as compared to short term, partners [49]. More masculine traits, such as lower voice pitch [50] and (to some extent) larger penis size [51, 52] are correlated with testosterone levels, which besides may influence men's mating goals and bewitchery. Since a larger penis size is perceived as more masculine [53, 54], we predict women will adopt a larger penis for shorter-term sexual relationships.

Women likely make penis size judgments partly using their recalled experiences. Even so, it is unclear how accurately women can think penis size. Exposed to nude male images, women practice attend to the genital area [55, 56]. People tin can more often than not recall if a penis was described as "large", "medium", or "small", or not described at all [28]. In the current study, women'southward ability to recall penis size was tested past friction match-to-sample recall, both immediately and after a delay of 10 minutes.

Materials and Methods

Stimuli: The penis models

Based on previous studies (see above) about the distributions of penis length and circumference, the boilerplate American cock penis length was estimated as 6 inches (15.two cm) and circumference as 5 inches (12.7 cm). Models were created to range +/- three.0 S.D. across each dimension (see Fig 1). This resulted in length ranging iv.0 inches to 8.v inches (10.ii cm to 21.6 cm), and circumference (circumference) ranging from ii.5 inches to seven.0 inches (six.iv cm to 17.vii cm), using 0.5-inch (1.3 cm) increments (see Fig i). This yielded a x X 10 matrix of 100 possible sizes. Yet, such a large choice set could overwhelm participants. We chose to sample ane/three of this infinite, yielding 33 models across the range of space.

Fig 1. Sizes of printed models.

Shading indicates the average penis length and girth in the USA. Bold indicates models used for retrieve (immediate/delayed, counterbalanced) tests. Units are in inches.

https://doi.org/10.1371/journal.pone.0133079.g001

The penis model shape was a cylinder, representing the shaft, topped by a dome, representing the penis head (meet Fig ii). Of course, the man penis shaft is comprised of three corpora that could exist ameliorate represented past a rounded triangle and a more complex glans. Likewise, no veins, testicles, or other details of the penis were portrayed. These details were not represented for iii reasons. Showtime, there are no mathematical descriptions available to accurately represent normal proportions of more complex penile structure. Second, women generally rate male nudes as less attractive than heterosexual men charge per unit female nudes [57], and then making the penis model more realistic might accept provoked negative responses. Third, the written report was focused on overall penis size, non penis shape or surface details. While one motivation behind the current study was to improve the ecological validity of the stimuli, these concerns suggested starting with a more simplistic, cock penis model.

Fig 2. Penile Models.

A) Figurer graphic representation of i of the 'print files' used to produce the 3D penis models. B) Examples of (4 of 33) 3D models showing length in inches. A and D represent the largest and smallest models in the set, respectively; B and C represent the two models (counterbalanced) used to test recall for size.

https://doi.org/ten.1371/journal.pone.0133079.g002

Dimensions of commercial penile models practice non vary systematically, so they were not advisable for research purposes. Thus, the penis models were printed using a Makerbot Replicator 2 in blue ABS plastic ("Navy wool"; printer files for replications are at http://world wide web.thingiverse.com/matter:518401). Files were created using object-oriented Tinkercad [58] and compiled to.stl formats in G-Replicator [59]. Models were light-weight, sturdy plastic with a polish surface (see Fig ane). After printing, models were checked by measuring tape to ensure accuracy of length and circumference. None required reprinting for accurateness. The models were identified by randomly assigned letters (e.one thousand., "M", "CC") written on the lesser of each. This was washed to reduce the influence of "largest" and "smallest" anchors and also to eliminate the need for women to measure or infer specific size. The 33 models were evenly split (11, 11, 11) in a iii-tier wire basket to ease women'due south ability to discover the desired model. Baskets were randomly shuffled betwixt participants to reduce choice bias.

Participants

Volunteer were recruited past flyers around the California university campus, the neighborhood, and local physicians' offices. The flyers stated that women were requested to volunteer for a written report concerning sexuality. The flyers also stated that participants must be female, at least 18 years erstwhile, sexually attracted to men, and would be paid $20. The flyer did not mention penis size preferences. Women volunteered by either phone or an online grade requesting a phone phone call. They completed a phone screening to ostend their eligibility (e.g. being aged 18 or over, existence sexually attracted to men) before being scheduled as participants.

Procedures

Upon a participant'southward arrival, the Informed Consent document was provided, and women were given time to study information technology. Afterwards, they were given a chance to ask questions, then the experimenter asked whether they still wish to participate. If the participant verbally consented, the experimental protocol started. The Informed Consent document stated that continuing at this stage constituted consent. Participants never provided their names. Informed Consent was not documented using identifiable personal information, because it was unclear whether the new procedures might influence participants' willingness to report their penis size preferences.

Next, the participant answered questionnaires (described below) presented on a computer in a private room, using a secure connectedness, on private laboratory server space scripted by the first author in php5. This took most 50 minutes and included the penis size preference tasks and questionnaires (run into below). Figurer presentation of questionnaires has been shown to increase the reporting of socially less desirable behaviors [sixty]. After the questionnaires, she completed a 10-minute computer task (data to be reported elsewhere) assessing attention to sexual images. Subsequently, the participants was debriefed, offered the opportunity to ask questions, and given $20 cash. The study protocol, including Informed Consent protocol, was canonical past the University of California, Institutional Review Board.

Questionnaire

The cocky-written report questionnaires included demographic information (e.g., age, ethnicity, sexual orientation), sexual history (due east.g., number of sexual partners, sexual coercion, whether penis size played a role in human relationship dissolution(south), etc.), and electric current sexual functioning (e.g. orgasm rates, ease of lubrication, relationship monogamy status, pain during intercourse). These were used to characterize the sample. Other personality questionnaires were included, such as the Sexual Want Inventory [61] and the Sociosexual Orientation Scale [62] to narrate the sample.

Size preference and think: Retrieve accuracy

Subsequently completing the other questionnaires, the experimenter entered with i of the 2 test models. Ii of the original 33 models were randomly selected and reprinted (indicated in black cells in Fig ii). The experimenter informed the participant that she would be handed a model. She was instructed that she would be asked to try to call up the size of the model later inspecting information technology. During the inspection, she was asked not to measure the model using any objects in the room, but no instruction was provided regarding how she used her own easily. So, the experimenter left for 30 seconds (without observing the participant's inspection process), returned, took the test model from the participant and out of the testing room, and asked the participant to select which penis model (from the 33 described higher up) was most like in size to the exam model she just handled. The participant recorded the letter code from the bottom of that model into the computer.

The delayed-recall chore was similar, except this time, the participant did not immediately search for the model. Instead, she was given 10 minutes to complete the penis size preference questionnaire (below). The preference questionnaire would increase memory interference, which is desirable for ecological validity equally women asked to recall a former partner's penis size may accept sex with other new partners in the delay. After this, the participant was instructed to attempt to locate the second model (from the 33 described above). The test models were counter-balanced, then the recall type (immediate or delayed) would non be confounded with examination model size (larger or smaller).

Size preference and recall: Penis Size Preferences

Afterward completing the immediate recall task, participants answered 15 questions about their penis size preferences. Each involved picking 1 penis size model from amongst the 33 models available. The option "No respond" as well was bachelor for each. For this written report, the key questions were to select the model that they believed best reflected the boilerplate of men, which size is most probable to comport a sexually transmitted infection, and which size she would prefer for different expected human relationship durations. The questions about preferences for different types of partners were a flake more circuitous. For sometime partners the question was:

"Imagine y'all're single and you're out at a restaurant with some friends. You meet an attractive human who is as well single. He seems kind, intelligent, funny, and has a bully job. You are feeling sexually aroused. He says he'south in boondocks for a conference but he has to fly back home tomorrow afternoon. If you could spend merely this 1 night with him, what size would you desire him to be?"

For long-term partners the question was: "What would be the ideal size for a husband or serious, long-term beau?" The question regarding shorter-term partners clearly included much more detail. This was done in an attempt to control for intervening variables not of interest. For example, if a woman doubted at all for her condom with an unknown partner, she might select smaller models in the outcome of sexual assail. Thus, safety cues were included in the characterization.

Information analyses

Recall fault was calculated as the divergence of the dimension the participant chose minus the size of the actual sample. Thus, a positive number would point that participants chose a model larger than what they were shown. A within-participant ANOVA was calculated with the interaction of dimension (length, circumference) past call back (immediate, delayed. Put another style, the accuracy of recall could be affected by length or circumference being recalled better than the other dimension (dimension cistron), by the length of the delay was until they selected a model (recall), or an interaction where length or circumference were recalled better at either the shorter or longer delay.

Descriptive information are provided regarding the size that women believed was boilerplate and the range women indicated for their "smallest" and "largest" sexual partner. To test whether women's preferences differ by partner type, an ANOVA with dimension (length, circumference) X partner (one-time, long term) predicting preferred inches was conducted. A custom model was specified without dimension as a main upshot, because dimensions were stipulated to be different in the generation of the stimuli.

Results

Participant demographics and sexual experience

All participants (N = 75) were screened to report sexual attraction to men, and ranged in age from 18 to 65. They were California residents, mostly white or Asian, sexually experienced, currently in a sexual relationship, and had sex activity recently (meet Table 1). Twenty-seven pct of women reported that they had ended a relationship due, in part, to a mismatch between their penis size preference and their partner's penis size (come across Table 1). More than women cited that the penis was too small-scale as a trouble, rather than that the penis was as well large. The length and circumference of the model that each adult female believed best represented the "average" penis size is presented in Figs 3 and 4 shows every woman'south selection of the "smallest" and "largest" sexual partner with whom she had contact.

Call back accurateness

Near (North = 48) women selected the exactly correct model (in both length and circumference) at immediate recall (see Fig 5). Near half (N = 31) of women selected exactly the correct model at delayed remember. At that place was a chief consequence of dimension predicting model option error (F(1,73) = 11.6, p < .001, η_p ⁱⁱ = .14): participants slightly underestimated penis length subsequently the call up interval (M = -0.18 inches or -0.46 cm fault), but were very accurate recalling penis circumference (M = 0.02 inches or 0.05 cm fault). At that place was no main issue of delay nor dimension X delay interaction despite high power (f = .i, r = .ix, i-β = .97). Given the high accuracy, analyses for preferences were conducted every bit planned.

Fig five. Recalled sizes (immediate and delayed) slightly shorter than actual model with nearly picking exact model.

Note: "0" indicates the verbal correct model was chosen. Positive values indicate that the selected model was larger than the target model.

https://doi.org/x.1371/journal.pone.0133079.g005

Does the expected relationship duration affect penis size preference?

For the penis size preferences for 1-time or long-term partners, 15 women indicated "No respond". Analyses were conducted on the remaining participants (North = sixty). There was a small main consequence for expected relationship duration, F(1,59) = four.4, p = .04, η_p ⁱⁱ = .07 (meet Fig 6), such that participants preferred a slightly larger penis size in one-fourth dimension (length = 6.4 inches or 16.three cm, circumference = 5.0 inches or 12.7 cm) partners as compared to long-term partners (length = 6.3 inches or 16.0 cm, circumference = 4.8 inches or 12.2 cm). There was no interaction of dimension (length, circumference) and human relationship duration. Using independent t-tests separately predicting length and circumference preferences for partner type resulted in a significant difference for the test of circumference (t(59) = 2.4, p = .02, d = .two) but. Women preferred a larger circumference in erstwhile partners (M(SD) = 5.0(.ane)) relative to long-term partners (M(SD) = 4.8(.1)). As ANOVA corrects for multiple comparisons, information technology is a more than appropriate statistical exam for these data. These t-tests are noted for full disclosure of the analyses conducted. Just 16 women selected a model as "most likely to take an STI", whereas most women declined to select a model. Of the women who did respond, the model selected as nearly likely to take an STI was significantly larger (M(SD) = 6.ii(.3)) than the model women used to indicate their 1-night stand (G(SD) = 5.8(.2)) preference, F(1,15) =, p = .01, η_p ² = .35. This finding did not vary by the dimension (length, circumference).

Discussion

Women attended ane session in the laboratory during which they completed questionnaires about their sexual history and selected amid 3D erect penis models to indicate their size preferences for erstwhile or longer-term partners. The state-space appeared to well-narrate the range of women'southward experience, as their "largest" and "smallest" partners did non show evidence of ceiling or floor effects. Women tended to recall the size of the 3D models very well, only underestimating penis length. Women preferred a larger penis size (particularly a larger circumference) for sometime partners as compared to long-term partners. While this preference for a larger phallus is above the boilerplate penis size, information technology is only very slightly above the boilerplate. While nearly declined to identify a penis size almost likely to carry an STD, women selected even larger phallus sizes every bit the most likely to be infected with an STD.

A delay in model remember did not significantly worsen participant's remember of the model size. In fact, women were generally very authentic in identifying the aforementioned model at both immediate and delayed recall. When they did make errors, they slightly underestimated model length. One possible explanation is that women care more about circumference, so they may attend to it more [63]. Some authors have argued that penis length actually is more important and "healthy" to want than circumference (e.m., [64, 65]), merely others accept not replicated this reported pattern.

These data are generally consistent with Mautz et al. (2013), which asked women to rate the attractiveness of life-sized, projected, rotating drawings of male figures with flaccid penises of various sizes. Their participants preferred phalluses 2SD above their estimated population-boilerplate penis size, whereas our participants preferred penises that were only a trivial above average. This deviation may be due to their images depicting flaccid penises, whereas our models depicted erect penises.

Since women's preferences for both relationship types were slightly larger than the average male, the preferred size for the one-fourth dimension partner was farther from the average. Novelty itself contributes to pleasure [66], so seeking a more novel-sized penis may be consistent with a goal to pursue pleasure primarily in i-time partners. Women may prefer a smaller penis size in a long-term partner compared to a ane-fourth dimension partner for reasons of both concrete condolement and a preference for less masculinity in a longer term partner [67]. The difference in pleasance motive is also suggested by genital physiology. A larger circumference might stretch the vaginal opening such that the deep structures (clitoral crura and vestibular bulbs) are more stimulated, and the clitoral glans is more stimulated past penis movement [68]. Also, the vagina is densely packed with pressure-sensitive mechanoreceptors that detect stretch sensations [69]. These announced finely tuned to discover variability in circumference, whereas the vagina is less sensitive to differences in other stimuli such as vibration or warmth [seventy]. Other studies likewise found that women prefer a relatively larger penis proportional to torso size [31], peculiarly with respect to circumference (e.g., [54]). Given that women typically experience more pleasurable and orgasmic sex in longer-term relationships [71], they might adopt a larger penis for short-term sex partly then the increased physical sensation compensates for the reduced psychological connexion. In 1 notable exception, a preference for full general body somatotype did not differ by the relationship duration [brief uncommitted versus long-term partners in 72].

A larger penis could contribute to infection risks, such that a larger penis on more risky one-time partners elevates risk. A larger penis has been associated with college infection rates amongst men who take sex with men [73]. Also, an increment in friction during intercourse from a rubber is associated with the introduction of more bacteria into the vagina [74, 75] and more than vulvar erythema [74]. Finally, women report that condoms increase their experience of hurting during intercourse [76, 77]. Annihilation that increases friction during intercourse may promote genital injury, indirectly increasing infection risk. A larger phallus would increase friction relative to a smaller phallus. These potential complications of a larger penis suggest why the human penis has not evolved to be larger.

Individual differences amid the women were not examined in relationship to their penis size preferences, although various female traits could interact with their sexual health risks. For example, women with wider hips tend to accept a higher proportion of i-time sexual partners [78]. While women's vaginal depth and pelvic muscle tonicity has been characterized [79, 80], these traits have never been related to women's penis size preferences. Presumably, given the variability in vaginal size and tonicity, some women would feel more tearing with a larger phallus than other depending on the morphology of their particular vagina.

Generating haptic stimuli was relatively cost-constructive and simple. Gratuitous software was bachelor for generating impress files. Also, the print files are shared online to allow exact future replications. Undergraduate research assistants were able to create and monitor the work flow. The 3D printer used is now widely, cheaply commercially available. Expanding this model into preferences pertaining to other domains, or even for other penis shape preferences, appears desirable.

As a offset study using life-sized 3D models of erect penises to investigate preferences, some limitations exist. Models were not perfectly ecologically valid. They were blue to minimize racial peel-color cues. They were made with rigid, odorless plastic. They were a simplified dome-on-cylinder form rather than realistically shaped and textured. The male body was neither described nor portrayed. There were also limitations of self-report approaches. Men and women appear to accept actually get less approving of one-time sexual partners since 2001 [81], which may affect the preferences that they are willing to report regarding such partners. Also, a significant minority (15 of 75) of women chose non to written report a preference for penis size in short and long term partners, simply did answer both of the recall questions. Perhaps these women did non take a clear preference, consistent with weak penis size preferences reported in some previous studies [54, 65]. This could be viewed as a strength, insofar equally women did non feel compelled to answer in cases where they did not experience they had a potent enough basis to generate an answer.

Another limitation is sexual inexperience amid some participants. Xv women in our sample indicated that they had never experienced sexual intercourse. This inexperience could underlie some of the size preferences observed. For example, women generally conceptualize more pain with their offset intercourse than they actually experience [82], then they may show risk-averse penis size preferences (for shorter length and thinner circumference than they may prefer with experience). Less experienced women may also be less accurate in their size estimates. However, a follow-up analysis showed that having had sexual intercourse (yeah or no) did non predict penis size preferences, arguing against this possibility. A related limitation is that the experimental protocol necessarily limited the sample size, and these women were recruited largely near a college campus. At that place may exist other biases in the sample related to the recruitment method and sample size that were non identified.

There are several implications of these information for males interested in long-term female person partners. Males with a larger penis may exist at an advantage when pursuing short-term female partners. Likewise, this written report provides the first information on the accuracy of women'due south penis size judgments. Furthermore, women tended to slightly underestimate the length of penis models after a recall filibuster. Women may misremember specific partners penis attributes as smaller than they really are. This may exacerbate men's anxieties well-nigh their penis size. Men dissatisfied with their penis size accept historically benefitted more from counseling than from surgically increasing their penis size [83]. This may help explain why nearly men seeking surgical interventions for enlarging what they perceive to be a small penis actually take a penis that falls within a normal range [16]. Finally, 3D printing allows greater flexibility and complication in stimuli and highly accurate replications. This first employ of 3D stimuli to appraise preferences is promising. Increasing impress resolution and blitheness will broaden the research applications with haptic stimuli.

Acknowledgments

The authors would like to thank numerous research assistants at University of California, Los Angeles for their help with data collection. We too thank Ardershir Rahman for assistance with model design and printing.

Author Contributions

Conceived and designed the experiments: NP GM. Performed the experiments: NP JP SL. Analyzed the information: NP JP SL GM. Contributed reagents/materials/analysis tools: NP. Wrote the paper: NP JP SL GM.

References

1. 1. Tiggemann Grand, Martins Y, Churchett 50. Beyond muscles: Unexplored parts of men's body image. Journal of Health Psychology. 2008;thirteen(8):1163–72. pmid:18987089
   • View Article
   • PubMed/NCBI
   • Google Scholar
2. ii. Cheng PK, Chanoine JP. Should the Definition of Micropenis Vary According to Ethnicity? Hormone Research in Paediatrics. 2001;55(6):278–81.
   • View Article
   • Google Scholar
3. three. Choi IH, Kim KH, Jung H, Yoon SJ, Kim SW, Kim TB. 2nd to 4th digit ratio: a predictor of developed penile length. Asian Periodical of Andrology. 2011;13:710–4. pmid:21725330
   • View Article
   • PubMed/NCBI
   • Google Scholar
4. four. Shalaby ME, Almohsen AERM, El Shahid AR, Abd Al-Sameaa MT, Mostafa T. Penile length—somatometric parameters relationship in healthy Egyptian men. Andrologia. 2014:north/a–north/a.
   • View Article
   • Google Scholar
5. v. Siminoski M, Bain J. The relationships amidst height, penile length, and foot size. Annals of Sex Enquiry. 1993;6(3):231–5.
   • View Article
   • Google Scholar
6. six. Ponchietti R, Mondaini N, Bonafe 1000, Di Loro F, Biscioni Due south, Masieri L. Penile length and circumference: a report on three,300 young Italian males. European urology. 2001;39(ii):183–6. Epub 2001/02/27. 52434. pmid:11223678.
   • View Article
   • PubMed/NCBI
   • Google Scholar
7. 7. Soylemez H, Atar Thou, Sancaktutar AA, Penbegul N, Bozkurt Y, Onem M. Relationship between penile size and somatometric parameters in 2276 healthy young men. Int J Impot Res. 2012;24(iii):126–ix. pmid:22189447
   • View Commodity
   • PubMed/NCBI
   • Google Scholar
8. 8. Shah J, Christopher N. Can shoe size predict penile length? BJU International. 2002;90(6):586–7. pmid:12230622
   • View Article
   • PubMed/NCBI
   • Google Scholar
9. 9. Schneider T, Sperling H, Lümmen M, Syllwasschy J, Rübben H. Does penile size in younger men cause issues in condom use? a prospective measurement of penile dimensions in 111 young and 32 older men. Urology. 2001;57(two):314–8. http://dx.doi.org/10.1016/S0090-4295(00)00925-0. pmid:11182344
   • View Article
   • PubMed/NCBI
   • Google Scholar
10. 10. Johnston L, McLellan T, McKinlay A. (Perceived) Size really does matter: Male dissatisfaction with penis size. Psychology of Men and Masculinity. 2014;15(two):225–8.
    • View Article
    • Google Scholar
11. xi. Peter J, Valkenburg PM. Does exposure to sexually explicit Net material increment body dissatisfaction? A longitudinal study. Computers in Human being Beliefs. 2014;36(0):297–307. http://dx.doi.org/ten.1016/j.chb.2014.03.071.
    • View Article
    • Google Scholar
12. 12. Kvalem IL, Træen B, Lewin B, Štulhofer A. Self-perceived effects of Cyberspace pornography utilize, genital advent satisfaction, and sexual self-esteem among immature Scandinavian adults. Cyberpsychology: Journal of Psychosocial Research on Internet. 2014;8(4).
    • View Commodity
    • Google Scholar
13. 13. Veale D, Eshkevari East, Read J, Miles S, Troglia A, Phillips R, et al. Behavior almost Penis Size: Validation of a Scale for Men Ashamed almost Their Penis Size. The Periodical Of Sexual Medicine. 2014;eleven(1):84–92. pmid:24118940
    • View Article
    • PubMed/NCBI
    • Google Scholar
14. 14. Nabil N, Hosny H, Kadah A, Shamloul R. Evaluation of Surgical Result of Penile Augmentation and Lengthening Procedures. Urologia internationalis. 2013;90(iv):465–9. pmid:23548799
    • View Article
    • PubMed/NCBI
    • Google Scholar
15. fifteen. Kang D, Chung J, Kim Y, Lee H, Cho S, Chang T, et al. Efficacy and Prophylactic of Penile Girth Enhancement by Autologous Fat Injection for Patients with Thin Penises. Aesth Plast Surg. 2012;36(4):813–8.
    • View Article
    • Google Scholar
16. 16. Mondaini North, Ponchietti R, Gontero P, Muir GH, Natali A, Di Loro F, et al. Penile length is normal in most men seeking penile lengthening procedures. International Journal of Impotence Research. 2002;14(4):283.
    • View Article
    • Google Scholar
17. 17. Herbenick D, Schick V, Reece M, Sanders SA, Fortenberry JD. The Development and Validation of the Male person Genital Self-Image Calibration: Results from a Nationally Representative Probability Sample of Men in the United states. The Periodical Of Sexual Medicine. 2013;ten(six):1516–25. pmid:23551571
    • View Article
    • PubMed/NCBI
    • Google Scholar
18. 18. Althof SE, Cappelleri JC, Shpilsky A, Stecher Five, Diuguid C, Sweeney Thou, et al. Treatment responsiveness of the Self-Esteem And Relationship questionnaire in erectile dysfunction. Urology. 2003;61(five):888–92. Epub 2003/05/09. pmid:12735997.
    • View Article
    • PubMed/NCBI
    • Google Scholar
19. 19. Lawrance K-A, Byers ES. Sexual satisfaction in long-term heterosexual relationships: The interpersonal exchange model of sexual satisfaction. Personal Relationships. 1995;2(four):267–85.
    • View Commodity
    • Google Scholar
20. 20. Li NP, Kenrick DT. Sex similarities and differences in preferences for short-term mates: What, whether, and why. Journal of Personality and Social Psychology. 2006;90(v):468–89. Epub 3.
    • View Article
    • Google Scholar
21. 21. Royer HR, Falk EC, Heidrich SM. Genital Canker Beliefs: Implications for Sexual Health. Journal of Pediatric and Adolescent Gynecology. 2013;26(2):109–16. http://dx.doi.org/10.1016/j.jpag.2012.11.007. pmid:23337309
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
22. 22. Jonason PK, Li NP, Richardson J. Positioning the Booty-Call Relationship on the Spectrum of Relationships: Sexual but More Emotional Than Ane-Night Stands. The periodical of sex inquiry. 2010;48(5):486–95.
    • View Article
    • Google Scholar
23. 23. Kissinger P, White S, Schmidt N, Taylor SN, Mena L, Lillis R, et al. O07.i Sexual Relationship Importance and Safety Use Among Men Attending STD Clinics in Two Southern Cities in the United States. Sexually transmitted infections. 2013;89(Suppl 1):A38.
    • View Commodity
    • Google Scholar
24. 24. Loewenstein GF, Weber Eu, Hsee CK, Welch N. Adventure as feelings. Psychological Bulletin. 2001;127(two):267–86. pmid:11316014
    • View Article
    • PubMed/NCBI
    • Google Scholar
25. 25. Zink T, Fargo JD, Baker RB, Buschur C, Fisher BS, Sommers MS. Comparison of Methods for Identifying Ano-Genital Injury Subsequently Consensual Intercourse. The Journal of Emergency Medicine. 2010;39(1):113–eight. http://dx.doi.org/10.1016/j.jemermed.2008.08.024. pmid:19217245
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
26. 26. Anderson SL, Parker BJ, Bourguignon CM. Changes in genital injury patterns over fourth dimension in women afterward consensual intercourse. Periodical of Forensic and Legal Medicine. 2008;15(5):306–11. http://dx.doi.org/10.1016/j.jflm.2007.12.007. pmid:18511005
    • View Article
    • PubMed/NCBI
    • Google Scholar
27. 27. Johnston L, McLellan T, McKinlay A. (Perceived) Size Actually Does Thing: Male Dissatisfaction With Penis Size. Psychology of Men & Masculinity. 2014:No Pagination Specified.
    • View Article
    • Google Scholar
28. 28. Fisher WA, Branscombe NR, Lemery CR. The bigger the better? Arousal and attributional responses to erotic stimuli that draw dissimilar size penises. The journal of sex research. 1983;19(4):377–96.
    • View Article
    • Google Scholar
29. 29. Ernst MO, Banks MS. Humans integrate visual and haptic information in a statistically optimal fashion. Nature. 2002;415(6870):429–33. pmid:11807554
    • View Article
    • PubMed/NCBI
    • Google Scholar
30. 30. Dixson BJ, Dixson AF, Li B, Anderson MJ. Studies of human physique and sexual attractiveness: Sexual preferences of men and women in Communist china. American Journal of Human Biological science. 2007;xix(1):88–95. pmid:17160976
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
31. 31. Mautz BS, Wong BBM, Peters RA, Jennions Dr.. Penis size interacts with body shape and elevation to influence male attractiveness. Proceedings of the National Academy of Sciences. 2013.
    • View Article
    • Google Scholar
32. 32. Wessells H, Lue TF, McAninch JW. Penile Length in the Flaccid and Erect States: Guidelines for Penile Augmentation. The Journal Of Urology. 1996;156(three):995–7. http://dx.doi.org/x.1016/S0022-5347(01)65682-9. pmid:8709382
    • View Article
    • PubMed/NCBI
    • Google Scholar
33. 33. Sengezer M, Öztürk Due south, DevecI 1000. Accurate Method for Determining Functional Penile Length in Turkish Young Men. Register of Plastic Surgery. 2002;48(4):381–v. pmid:12068220
    • View Article
    • PubMed/NCBI
    • Google Scholar
34. 34. Awwad Z, Abu-Hijleh G, Basri S, Shegam N, Murshidi G, Ajlouni Chiliad. Penile measurements in normal adult Jordanians and in patients with erectile dysfunction. Int J Impot Res. 2004;17(2):191–5.
    • View Commodity
    • Google Scholar
35. 35. Furr KD. Penis size and magnitude of erectile change as spurious factors in estimating sexual arousal. Annals of Sexual activity Research. 1991;4(3–4):265–79. 1992-43496-001 0843–4611,4,3–4,265–279,1991.
    • View Article
    • Google Scholar
36. 36. Udelson D, Park K, Sadeghi-Najed H, Salimpour P, Krane RJ, Goldstein I. Centric penile buckling forces vs Rigiscan radial rigidity every bit a function of intracavernosal force per unit area: Why Rigiscan does non predict functional erections in individual patients. International Journal of Impotence Research. 2000;11:327–39.
    • View Article
    • Google Scholar
37. 37. Gaißert N, Wallraven C, Bülthoff HH. Visual and haptic perceptual spaces evidence high similarity in humans. Periodical of Vision. 2010;10(11).
    • View Article
    • Google Scholar
38. 38. Wallraven C, Bülthoff H, Waterkamp South, van Dam L, Gaißert North. The eyes grasp, the easily see: Metric category noesis transfers between vision and touch. Psychonomic Bulletin & Review. 2014;21(4):976–85.
    • View Commodity
    • Google Scholar
39. 39. Yildirim I, Jacobs RA. Transfer of object category knowledge beyond visual and haptic modalities: Experimental and computational studies. Cognition. 2013;126(ii):135–48. http://dx.doi.org/x.1016/j.cognition.2012.08.005. pmid:23102553
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
40. 40. Lawson R. Recognizing familiar objects by hand and human foot: Haptic shape perception generalizes to inputs from unusual locations and untrained trunk parts. Atten Percept Psychophys. 2014;76(ii):541–58. pmid:24197503
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
41. 41. Wallraven C. Touching on confront infinite: Comparison visual and haptic processing of face shapes. Psychonomic Bulletin & Review. 2014;21(4):995–1002.
    • View Commodity
    • Google Scholar
42. 42. Gaißert N, Waterkamp S, Fleming RW, Bülthoff I. Haptic Categorical Perception of Shape. PLoS I. 2012;7(8):e43062. pmid:22900089
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
43. 43. Norman JF, Kappers AL, Beers A, Scott AK, Norman H, Koenderink J. Aging and the haptic perception of 3D surface shape. Atten Percept Psychophys. 2011;73(3):908–18. pmid:21264712
    • View Article
    • PubMed/NCBI
    • Google Scholar
44. 44. Khan S, Somani B, Lam W, Donat R. Establishing a reference range for penile length in Caucasian British men: a prospective study of 609 men. BJU International. 2012;109(v):740–iv. pmid:21711435
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
45. 45. Gebhard P, Johnson AB. The Kinsey information: marginal tabulations of the 1938–1963 interviews. Philadelphia: WB Saunders, 1979.
46. 46. Brody S, Weiss P. Vaginal Orgasm Is Associated with Vaginal (Non Clitoral) Sex Didactics, Focusing Mental Attention on Vaginal Sensations, Intercourse Elapsing, and a Preference for a Longer Penis. The Periodical Of Sexual Medicine. 2010;seven(eight):2774–81. pmid:19732304
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
47. 47. Richters J, Gerofi J, Donovan B. Are condoms the correct size(s)? A method for cocky-measurement of the erect penis. Venerology. 1995;8(2):77–81.
    • View Article
    • Google Scholar
48. 48. Herbenick D, Reece M, Schick V, Sanders SA. Erect Penile Length and Circumference Dimensions of 1,661 Sexually Active Men in the U.s.. The Journal Of Sexual Medicine. 2014;11(1):93–101. pmid:23841855
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
49. 49. Lee AJ, Dubbs SL, Von Hippel W, Brooks RC, Zietsch BP. A multivariate approach to human mate preferences. Evolution and Human Beliefs. 2014;35(3):193–203. http://dx.doi.org/10.1016/j.evolhumbehav.2014.01.003.
    • View Article
    • Google Scholar
50. 50. Evans S, Neave N, Wakelin D, Hamilton C. The human relationship between testosterone and vocal frequencies in man males. Physiology & Behavior. 2008;93(4–five):783–eight. http://dx.doi.org/10.1016/j.physbeh.2007.eleven.033.
    • View Article
    • Google Scholar
51. 51. Baskin LS, Sutherland RS, DiSandro MJ, Hayward SW, Lipschutz J, Cunha GR. The Effect of Testosterone on Androgen Receptors and Human being Penile Growth. The Journal Of Urology. 1997;158(3):1113–eight. http://dx.doi.org/10.1016/S0022-5347(01)64400-8. pmid:9258152
    • View Article
    • PubMed/NCBI
    • Google Scholar
52. 52. Boas 1000, Boisen KA, Virtanen HE, Kaleva Thou, Suomi AM, Schmidt IM, et al. Postnatal penile length and growth rate correlate to serum testosterone levels: a longitudinal study of 1962 normal boys. European periodical of endocrinology / European Federation of Endocrine Societies. 2006;154(ane):125–9. Epub 2005/12/31. pmid:16382001.
    • View Article
    • PubMed/NCBI
    • Google Scholar
53. 53. Eisenman R. Penis size: Survey of female perceptions of sexual satisfaction. BMC women'south wellness. 2001;i(one):1. Epub 2001/06/21. pmid:11415468; PubMed Fundamental PMCID: PMC33342.
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
54. 54. Francken AB, van de Wiel HBM, van Driel MF, Weijmar Schultz WCM. What Importance Exercise Women Attribute to the Size of the Penis? European urology. 2002;42(v):426–31. http://dx.doi.org/10.1016/S0302-2838(02)00396-ii. pmid:12429149
    • View Article
    • PubMed/NCBI
    • Google Scholar
55. 55. Lykins Advert, Meana M, Strauss GP. Sex differences in visual attending to erotic and non-erotic stimuli. Archives of Sexual Beliefs. 2008;37(2):219–28. pmid:17668312
    • View Article
    • PubMed/NCBI
    • Google Scholar
56. 56. Nummenmaa Fifty, Hietanen J, Santtila P, Hyönä J. Gender and Visibility of Sexual Cues Influence Center Movements While Viewing Faces and Bodies. Archives of Sexual Behavior. 2012;41(6):1439–51. pmid:22402995
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
57. 57. Lang PJ, Bradley MM, Cuthbert BN. International melancholia movie system (IAPS): Affective ratings of pictures and instruction transmission. Technical Report A-8. Gainesville, FL: University of Florida, 2008.
58. 58. Backman One thousand, Mononen M. Tinkercad. Available: https://tinkercad.com/virtually/2011.
59. 59. Hoeken Z, Kintel K, Mayer A, Mets M. ReplicatorG. 2012.
60. 60. Locke SD, Gilbert BO. Method of psychological assessment, cocky-disclosure, and experiential differences: A report of computer, questionnaire, and interview assessment formats. Periodical of Social Behavior & Personality. 1995;10(1):255–63.
    • View Article
    • Google Scholar
61. 61. Spector I, Carey M, Steinberg L. The Sexual Desire Inventory: Development, factor structure, and evidence of reliability. Journal of Sex & Marital Therapy. 1996;22(3):175–90.
    • View Article
    • Google Scholar
62. 62. Simpson JA, Gangestad SW. Individual differences in sociosexuality: Evidence for convergent and discriminant validity. Journal of Personality & Social Psychology. 1991;60(6):870–83. 1991-26250-001 0022–3514,threescore,6,870–883,1991.
    • View Article
    • Google Scholar
63. 63. Francken AB, van de Wiel HB, van Driel MF, Weijmar Schultz WC. What importance do women attribute to the size of the penis? European urology. 2002;42(5):426–31. Epub 2002/xi/14. pmid:12429149.
    • View Article
    • PubMed/NCBI
    • Google Scholar
64. 64. Francken AB, van de Wiel HBM, Van Driel MF, & Weijmar Schultz WCMW. What importance do women attribute to size of the penis? European urology. 2002;42:426–31. pmid:12429149
    • View Article
    • PubMed/NCBI
    • Google Scholar
65. 65. Štulhofer A. How (Un)Important Is Penis Size for Women with Heterosexual Experience? Archives of Sexual Behavior. 2006;35(one):5–half dozen. pmid:16502148
    • View Article
    • PubMed/NCBI
    • Google Scholar
66. 66. Bunzeck N, Doeller CF, Dolan RJ, Duzel Due east. Contextual interaction between novelty and reward processing within the mesolimbic arrangement. Human being Brain Mapping. 2012;33(six):1309–24. pmid:21520353
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
67. 67. Little AC, Jones BC, Penton-Voak IS, Burt DM, Perrett DI. Partnership status and the temporal context of relationships influence human female preferences for sexual dimorphism in male face up shape. Proceedings of the Royal Society of London Series B: Biological Sciences. 2002;269(1496):1095–100. pmid:12061950
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
68. 68. Wallen K, Lloyd EA. Female sexual arousal: Genital beefcake and orgasm in intercourse. Hormones and Behavior. 2011;59(five):780–92. http://dx.doi.org/10.1016/j.yhbeh.2010.12.004. pmid:21195073
    • View Article
    • PubMed/NCBI
    • Google Scholar
69. 69. Berman JR, Adhikari SP, Goldstein I. Anatomy and physiology of female person sexual function and dysfunction: nomenclature, evaluation and treatment options. European urology. 2000;38(one):20–nine. pmid:10859437.
    • View Article
    • PubMed/NCBI
    • Google Scholar
70. 70. Vardi Y, Gruenwald I, Sprecher East, Gertman I, Yartnitsky D. Normative values for female genital sensation. Urology. 2000;56(half-dozen):1035–twoscore. pmid:11113756
    • View Article
    • PubMed/NCBI
    • Google Scholar
71. 71. Armstrong EA, England P, Fogarty ACK. Bookkeeping for Women'southward Orgasm and Sexual Enjoyment in College Hookups and Relationships. American Sociological Review. 2012;77(3):435–62.
    • View Article
    • Google Scholar
72. 72. Dixson BJ, Grimshaw GM, Ormsby DK, Dixson AF. Center-tracking women's preferences for men's somatotypes. Development and Human Behavior. 2014;35(2):73–ix. http://dx.doi.org/x.1016/j.evolhumbehav.2013.ten.003.
    • View Article
    • Google Scholar
73. 73. Grov C, Parsons J, Bimbi D. The Association Between Penis Size and Sexual Health Among Men Who Accept Sex with Men. Archives of Sexual Beliefs. 2010;39(3):788–97. pmid:19139986
    • View Article
    • PubMed/NCBI
    • Google Scholar
74. 74. Eschenbach DA, Patton DL, Hooton TM, Meier AS, Stapleton A, Aura J, et al. Furnishings of Vaginal Intercourse with and without a Prophylactic on Vaginal Flora and Vaginal Epithelium. Journal of Infectious Diseases. 2001;183(six):913–8. pmid:11237808
    • View Article
    • PubMed/NCBI
    • Google Scholar
75. 75. Soper DE, Brockwell NJ, Dalton HP. Evaluation of the effects of a female rubber on the female lower genital tract. Contraception. 1991;44(1):21–9. http://dx.doi.org/10.1016/0010-7824(91)90103-M. pmid:1893699
    • View Article
    • PubMed/NCBI
    • Google Scholar
76. 76. Crosby R, Milhausen R, Mark K, Yarber West, Sanders Due south, Graham C. Understanding Issues with Condom Fit and Feel: An Important Opportunity for Improving Clinic-Based Safer Sex Programs. J Primary Prevent. 2013;34(i–2):109–15.
    • View Article
    • Google Scholar
77. 77. Fennell J. "And Isn't that the point?": pleasure and contraceptive decisions. Contraception. 2014;89(4):264–70. http://dx.doi.org/x.1016/j.contraception.2013.11.012. pmid:24332430
    • View Article
    • PubMed/NCBI
    • Google Scholar
78. 78. Simpson V, Brewer Chiliad, Hendrie C. Evidence to Advise that Women's Sexual Behavior is Influenced by Hip Width Rather than Waist-to-Hip Ratio. Archives of Sexual Behavior. 2014:i–5.
    • View Article
    • Google Scholar
79. 79. Barnhart KT, Izquierdo A, Pretorius ES, Shera DM, Shabbout Yard, Shaunik A. Baseline dimensions of the human vagina. Human Reproduction. 2006;21(6):1618–22. pmid:16478763
    • View Article
    • PubMed/NCBI
    • Google Scholar
80. 80. Pendergrass PB, Belovicz MW, Reeves CA. Expanse of the Human Vagina as Measured from Vinyl Polysiloxane Casts. Gynecologic and Obstetric Investigation. 2003;55(2):110–3. pmid:12771458
    • View Article
    • PubMed/NCBI
    • Google Scholar
81. 81. Prah P, Copas AJ, Mercer CH, Clifton S, Erens B, Phelps A, et al. Consistency in reporting sensitive sexual behaviours in Britain: alter in reporting bias in the 2nd and third National Surveys of Sexual Attitudes and Lifestyles (Natsal-ii and Natsal-3). Sexually transmitted infections. 2013.
    • View Article
    • Google Scholar
82. 82. Weis DL. The experience of pain during women's first sexual intercourse: Cultural mythology about female sexual initiation. Archives of Sexual Behavior. 1985;xiv(five):421–38. pmid:4062539
    • View Commodity
    • PubMed/NCBI
    • Google Scholar
83. 83. Nugteren HM, Balkema GT, Pascal AL, Schultz WCMW, Nijman JM, van Driel MF. 18-Yr Experience in the Management of Men With a Complaint of a Small Penis. Journal of Sex & Marital Therapy. 2010;36(2):109–17.
    • View Commodity
    • Google Scholar

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