Diagram showing how to measure the length and circumference of an erect human penis
Reading: Human penis size
human penises vary in size on a number of measures, including length and circumference when soft and tumid. Besides the natural variability of human penises in cosmopolitan, there are factors that lead to minor variations in a particular male, such as the level of arousal, clock time of day, room temperature, anxiety charge, sport activity and frequency of sexual activity. Compared to early primates, including big examples such as the gorilla, the homo penis is blockheaded, both in absolute terms and proportional to the stay of the body. Measurements vary, with studies that rely on self-measurement reporting a significantly higher average than those with a health professional measure. As of 2015, a taxonomic review of 15,521 men, who were measured by health professionals rather than themselves, concluded that the average length of an raise human penis is 13.12 centimeter ( 5.17 inches ) long, while the average circumference of an tumid homo penis is 11.66 curium ( 4.59 inches ). [ 1 ] Flaccid penis length can sometimes be a hapless predictor of raise length. Most human penis increase occurs between infancy and the age of five, and between about one class after the onset of puberty and, at latest, approximately 17 years of long time. [ 2 ] A statistically meaning correlation between penis size and the size of other body parts has not been found in research. Some environmental factors in addition to genetics, such as the presence of endocrine disruptors, can affect penis growth. An adult penis with an raise length of less than 7 curium ( 2.8 in ), but otherwise formed normally, is referred to in medicine as a micropenis .
 distribution of penis sizes by length. 45 % of erect penises are between 12 and 14 centimeter long .  distribution of penis sizes by circumference. 81 % of tumid penises ( green ) are between 10 and 13 centimeter in circumference .  Percentile of penile length  Percentile of penile circumference While results vary slightly across reputable studies, the consensus is that the mean homo penis, when tumid, is in the stove 12.9–15 curium ( 5.1–5.9 in ) in duration. [ 3 ] [ 4 ] [ 5 ] A 2015 systematic review published by Veale et alabama. of medical research on the topic over the previous 30 years published in BJU International showed exchangeable results, giving think of soft, stretched non-erect, and raise lengths of 9.16 centimeter, 13.24 centimeter, and 13.12 centimeter respectively, and bastardly flaccid and erect circumferences of 9.31 cm and 11.66 curium respectively. rear lengths in the admit studies were measured by pushing the pre-pubic fatty pad to the bone, and soft or raise girth ( circumference ) was measured at the base or mid-shaft of the penis. [ 1 ]
One sketch ( published in 1996 ) found the beggarly flaccid penis distance to be 3.5 inches ( 8.9 curium ) ( measured by staff ). [ 3 ] A review of respective studies found average flaccid length to be 9–10 centimeter ( 3.5–3.9 in ). [ 6 ] Length of the flaccid penis does not necessarily correspond to length of the tumid penis ; some smaller flaccid penises grow much longer, while some larger soft penises grow relatively less. [ 7 ] The penis and scrotum can abridge involuntarily in reaction to cold temperatures, anxious or skittish horizontal surface and engagement in sports. [ 8 ] This decrease of flaccid penis size is referred to by the slang term “ shrinkage ”, due to action by the cremaster muscle. The lapp phenomenon affects cyclists and practice bicycle users, with prolong pressure on the perineum from the bicycle saddle and the sift of the drill causing the penis and scrotum to compress involuntarily. An faulty saddle may ultimately cause erectile dysfunction ( see fork press for more information ). Individuals with hard soft syndrome or other pelvic floor disorders may temporarily have an abnormally small penis .
Neither long time nor size of the flaccid penis accurately predicted erectile length. Stretched length has correlated with erect length in some cases. [ 3 ] however, studies have besides shown drastic differences between stretched and rear length. [ 9 ] One study found that a minimal tension military unit of approximately 450 g during stretching of the penis was required to reach a broad likely erection distance. this study besides found that tension forces exerted in this study by the urologist were shown to be importantly ( P < 0.01 ) lower than 450g. [ 10 ] This may account for differences between stretched and erect length .
- The 2015 study of 15,521 men found that the average length of a stretched flaccid penis was 13.24 cm (5.21 inches) long, which is near identical to the average length of an erect human penis which is 13.12 cm (5.17 inches) long.
- An 2001 study of about 3,300 men published in European Urology concluded that flaccid stretched length was measured on average to about 12.5 cm (4.9 in). In addition, they checked for correlations in a random subset of the sample consisting of 325 men. They found a few statistically significant Spearman’s correlations: between flaccid length and height of 0.208, −0.140 with weight, and −0.238 with BMI, flaccid circumference and height 0.156, stretched length and height 0.221, weight −0.136, BMI −0.169. They also reported a few non-significant correlations.
Scientific studies have been performed on the rear length of the adult penis. Studies that have relied on self-measurement, including those from Internet surveys, systematically reported a higher median length than those that used checkup or scientific methods to obtain measurements. [ 5 ] [ 13 ] The trace staff-measured studies are composed of different subgroups of the homo population ( in other words, specific historic period range or race ; choice of those with sexual medical concerns or self-selection ) that could cause a sample bias. [ 13 ] [ 14 ]
- In a study of 80 healthy males published in the September 1996 Journal of Urology an average erect penis length of 12.9 cm (5.1 in) was measured. The purpose of the study was to “provide guidelines of penile length and circumference to assist in counseling patients considering penile augmentation.” Erection was pharmacologically induced in 80 physically normal American men (varying ethnicity, average age 54). It was concluded: “Neither patient age nor size of the flaccid penis accurately predicted erectile length.”
- A study published in the December 2000 International Journal of Impotence Research found that average erect penis length in 50 Jewish Caucasian males was 13.6 cm (5.4 in) (measured by staff). The study intended “to identify clinical and engineering parameters of the flaccid penis for prediction of penile size during erection.” Erection was pharmacologically induced in 50 Jewish Caucasian patients who had been evaluated for erectile dysfunction (ED) (average age 47±14y). Patients with penis abnormalities or whose ED could be attributed to more than one psychological origin were omitted from the study.
- A review published in the 2007 issue of BJU International showed the average erect penis length to be 14–16 cm (5.5–6.3 in) and girth to be 12–13 cm (4.7–5.1 in). The paper compared results of twelve studies conducted on different populations in several countries. Various methods of measurements were included in the review.
- A 2015 study by BJU International concluded the average erect penis length to be 13.12 cm (5.16 inches).
- A 2013 study of 253 men from Tanzania found that the average erect penis length of Tanzanian males was 13.12cm (5.17 inches)
- An Indian study (published in 2007) of 301 men ages 18 to 60 published in the International Journal of Impotence Research found flaccid, stretched and erect length to be 8.21 cm (3.23 in), 10.88 cm (4.28 in) and 13.01 cm (5.12 in), respectively.
- A Korean study (published in 1971) of 702 men ages 21 to 31 identified the average erect penis length to be 12.70 cm (5.00 in). Another study (from 1998) of 150 Koreans found the average erect penis length to be 13.42 cm (5.28 in). The most recent study (published in 2016) of 248 Korean men identified the average erect penis length to be 13.53 cm (5.33 in).
- A 2020 review in the Journal of Sex & Marital Therapy found that the majority of men believed that the average erect penis length is more than 15.24 cm (6 inches). This inaccurate belief has likely been fed by inaccurate and exaggerated data presented in studies where the size of the participants erect penis is self-reported. Participants may report overestimates of the size of their penis in the belief that a larger penis is more socially desirable. The same review analyzed the results from ten prior studies where measurements of erect penis size were made by researchers. They reported an erect penis to be between 12.95 and 13.92 cm (5.1 and 5.5 inches, respectively) in length, a result significantly below the average obtained in self-reported studies. The authors commented that results of such measurement studies may still be inflated due to volunteer bias – the possibility that men with larger penises may be more likely to choose to participate in such studies.
alike results exist regarding studies of the circumference of the pornographic fully erect penis, with the measurement normally taken mid-shaft. [ 6 ] As with duration, studies that relied on self-measurement systematically reported a significantly higher modal than those with staff measuring. In a study of penis size where measurements were taken in a testing ground sic, the average penis circumference when rear was 11.66 centimeter ( 4.59 inches ). [ 1 ]
size at birth
The average stretched penile length at parentage is about 4 curium ( 1.6 in ), and 90 % of newborn boys will be between 2.4 and 5.5 centimeter ( 0.94 and 2.17 in ). limited growth of the penis occurs between parturition and 5 years of age, but very little occurs between 5 years and the onset of puberty. The median size at the begin of puberty is 6 curium ( 2.4 in ) with pornographic size reached about 5 years subsequently. W.A. Schonfeld published a penis growth crook in 1943. [ 21 ]
size with ageing
Authors of a paper reviewing research on area of penis sizes conclude that “ flaccid penile distance is just under 4 curium ( 1.6 in ) at parentage and changes identical fiddling until puberty, when there is mark growth. ” [ 2 ] [ 6 ] Age is not believed to negatively correlate with penis size. “ individual research studies have … suggested that penis size is smaller in studies focusing on older men, but Wylie and Eardley found no overall differences when they collated the results of versatile studies [ over a 60 year period ]. ” [ 6 ]
size and acme
A 2015 review of the literature found two studies finding acme and stretched or soft length to be moderately correlated, seven studies finding decrepit correlation coefficient for soft, stretched, or rear length, and two studies that found no correlation coefficient between flaccid length and acme. [ 1 ]
size and hands
One study investigated the relationship with digit proportion and found that men with longer ring fingers than index fingers had slightly longer penises. [ 22 ] [ 23 ] however, the coarse misconception that hand size predicts penis size has been widely discredited. [ 24 ] [ 25 ]
size and other torso parts
A statistically meaning correlation between penis size and the size of other body parts has not been found in inquiry. One study, Siminoski and Bain ( 1988 ), found a weak correlation between the size of the stretch penis and foot size and stature ; however, it was besides fallible to be used as a virtual calculator. [ 26 ] Another investigation, Shah and Christopher ( 2002 ), which cited Siminoski and Bain ( 1988 ), failed to find any evidence for a associate between shoe size and stretched penis size, stating “ the supposed association of penile distance and shoe size has no scientific basis ”. [ 27 ] [ 28 ] There may be a liaison between the deformity of the genitalia and the human limb. The development of the penis in an embryo is controlled by some of the same Hox genes ( in particular HOXA13 and HOXD13 ) [ 29 ] as those that control the development of the limbs. Mutations of some Hox genes that control the growth of limbs cause malformed genitalia ( hand-foot-genital syndrome ). [ 30 ]
size and race
The belief that penis size varies according to slipstream is not supported by scientific evidence. [ 6 ] [ 31 ] A 2005 study reported that “ there is no scientific setting to support the alleged ‘oversized ‘ penis in black people ”. [ 32 ] A study of 253 men from Tanzania found that the average stretched flaccid penis length of tanzanian males is 11 curium ( 4.53 inches ) long, smaller than the worldwide average, stretched flaccid penis length of 13.24 centimeter ( 5.21 inches ), and average raise penis length of 13.12 centimeter ( 5.17 inches ). [ 33 ] A 2016 study of 248 korean men identified the average rear penis length to be 13.53 centimeter ( 5.33 in ). [ 19 ] A study of 115 men from Nigeria found that the average soft stretched penis duration of nigerian males is 13.37 centimeter ( 5.26 inches ) long, which is near identical to the cosmopolitan modal, stretched flaccid penis distance of 13.24 centimeter ( 5.21 inches ) and modal tumid penis length of 13.12 centimeter ( 5.17 inches ). [ 34 ] A 2015 taxonomic review of 15,521 men found “ no indications of differences in racial unevenness ”, and stated that it was not potential to draw any conclusions about size and race from the available literature and that farther inquiry needed to be conducted. [ 1 ] According to Aaron Spitz, a urologist, many websites and studies promoting mutant of penis size between races use unscientific methods of collecting data and often ignore at odds evidence. He concludes that “ when you in truth take a good look at the naked data, there ’ s not a whole lot there [ showing racial variation in penis size ]. ” [ 35 ]
size preferences among sexual partners
In a small study conducted by University of Texas–Pan American and published in BMC Women’s Health, 50 undergraduate women were surveyed by two popular male athletes on campus about their perceptions of sexual satisfaction and it was concluded that the width of a penis feels better than the length of a penis, when subjects are asked to choose between the two ( size was left unspecified ). It was besides concluded that this may show that penis size overall affects intimate atonement since women chose between the two options they were given. [ 36 ] In a cover history by Psychology Today, [ 37 ] [ 38 ] 1,500 readers ( about two-thirds women ) were surveyed about male soundbox trope. Many of the women were not particularly concerned with penis size, and all over 71 % thought men overemphasized the importance of penis size and form. by and large, the women polled cared more about width than men thought, and less about duration than men thought, although the lastingness of caring for either among women showed a exchangeable radiation pattern. Another study, conducted at Groningen University Hospital, asked 375 sexually active voice women ( who had recently given parentage ) the importance of penis size the results of which showed that 21 % of women felt duration was important and 32 % felt that cinch was crucial. [ 39 ] A study conducted at the australian National University, published in early 2013, showed that penis size influences a man ‘s sex entreaty, and the tall the man, the bigger the consequence. [ 40 ] The study showed 3D computer generated images at life-size, altering the stature and other physical attributes, with women typically registering preferences in under 3 seconds. A preference for improbable men ‘s larger penis size was celebrated. A U.S. learn published in 2015 of the declared preferences of a dialog box of 75 women using 3D-printed models as scale references showed a favored penis distance of 16 curium ( 6.3 inches ) and a prefer circumference of 12.2 centimeter for long-run intimate partners, with slenderly larger prefer sizes of a length of 16.3 curium ( 6.4 inches ) and circumference of 12.7 curium for erstwhile sexual encounters. [ 41 ] According to studies, when asked to estimate the length of their partners penis, most would say a size importantly smaller than what their partner was recorded to be. Suggesting that percept of size is not entirely accurate. [ 41 ]
One australian study of 184 men looked at penis duration and circumference in relationship to condom breakage or slippage. 3,658 condoms were used. The sketch found that when used correctly, condoms had a breakage pace of 1.34 % and a slippage rate of 2.05 %, for a sum failure rate of 3.39 %. penile dimensions did not influence slippage, although penis circumference and break in condoms were strongly correlated, with larger sizes increasing the pace of breakage. [ 42 ]
Androgens like testosterone are responsible for penis expansion and elongation during puberty. [ 43 ] Penis size is positively correlated with increasing testosterone levels during puberty. [ 44 ] But after puberty, administration of testosterone does not affect penis size, and androgen lack in adult men lone results in a little decrease in size. [ 44 ] Growth hormone ( GH ) and insulin-like growth factor 1 ( IGF-1 ) are besides involved in penis size, with insufficiency ( such as that observed in growth hormone lack or Laron syndrome ) at critical developmental stages having the electric potential to result in micropenis. [ 45 ]
assorted size penises. There are boastfully individual differences in penis size .
There are certain genes, like homeobox ( Hox a and vitamin d ) genes, which may have a function in regulating penis size. In humans, the AR gene, located on the X chromosome at Xq11-12, may affect penis size. The SRY gene located on the Y chromosome may have a function to play. Variance in size can frequently be attributed to de novo mutations. insufficiency of pituitary increase hormone or gonadotropins or balmy degrees of androgen insensitivity can cause little penis size in males and can be addressed with emergence hormone or testosterone treatment in early childhood .
An adult penis with an rear length of less than 7 centimeter or 2.76 inches but otherwise formed normally is referred to in a aesculapian context as having the micropenis condition. [ 46 ] The discipline affects 0.6 % of men. [ 7 ] Some of the identifiable causes are insufficiency of pituitary increase hormone or gonadotropins, balmy degrees of androgen insensitivity, a variety of genic syndromes and variations in certain homeobox genes. Some types of micropenis can be addressed with emergence hormone or testosterone discussion in early childhood. Operations are besides available to increase penis size in cases of micropenis in adults. [ 47 ]
Measuring raise micropenis
It has been suggested that differences in penis size between individuals are caused not only by genetics, but besides by environmental factors such as culture, diet and chemical or befoulment exposure. [ 48 ] [ 49 ] [ 50 ] [ 51 ] Endocrine dislocation resulting from chemical exposure has been linked to genital deformation in both sexes ( among many other problems ). Chemicals from both synthetic ( for example, pesticides, anti-bacterial triclosan, plasticizers for plastics ) and natural ( for example, chemicals found in tea tree oil and lavender oil ) [ 52 ] [ 53 ] sources have been linked to assorted degrees of endocrine dislocation. Both PCBs and the plasticizer DEHP have been associated with smaller penis size. [ 54 ] DEHP metabolites measured from the urine of fraught women have been significantly associated with the decrease penis width, shorter anogenital distance and the incomplete lineage of testicles of their newborn sons, replicating effects identified in animals. [ 55 ] According to a 2008 study published by the US National Library of Medicine, approximately 25 % of US women have phthalate levels similar to those observed in animals. [ 55 ] A 2007 analyze by the University of Ankara, Faculty of Medicine found that penile size may decrease as a result of some hormonal therapy combined with external beam radiation therapy. [ 56 ] In addition, some estrogen-based birthrate drugs like diethylstilbestrol ( DES ) have been linked to genital abnormalities or a smaller than normal penis ( micropenis ). [ 57 ] A 2016 Korean analyze found that newborn male circumcision is associated with shorter penile duration. [ 19 ]
prehistory and early civilizations
Perceptions of penis size are culture-specific. [ 58 ] Some prehistoric sculptures and petroglyphs portray male figures with exaggerated erect penises. [ 59 ] Ancient egyptian cultural and artistic conventions broadly prevented big penises from being shown in art, as they were considered abhorrent, [ 60 ] but the scruffy, balding male figures in the Turin Erotic Papyrus are shown with hyperbolically large genitals. [ 60 ] [ 61 ] The egyptian idol Geb is sometimes shown with a massive tumid penis and the idol Min is about always shown with an erection. [ 59 ]
kouros sculpture from c. 530 BC, showing an idealized young man with a small penis ancient Greeksculpture from Anavyssos dating to530 BC, showing an idealized young man with a small penis Ancient Roman fresco from the House of the Vettii in Pompeii, dating to the first hundred AD, showing the idol Priapus weighing his massive, permanently tumid penis against a bag of amber The ancient Greeks believed that small penises were ideal. [ 58 ] Scholars believe that most ancient Greeks probably had roughly the lapp size penises as most other Europeans, [ 58 ] but Greek artistic portrayals of fine-looking youths show them with inordinately small, uncircumcised penises with disproportionately large foreskins, [ 58 ] indicating that these were seen as ideal. [ 58 ] Large penises in greek artwork are reserved entirely for comically grotesque figures, [ 58 ] [ 59 ] such as satyr, a class of hideous, horse-like forest spirits, who are shown in greek art with absurdly massive penises. [ 58 ] Actors portraying male characters in ancient greek comedy wore enormous, fake, bolshevik penises, which dangled underneath their costumes ; [ 63 ] these were intended as pathetic and were meant to be laughed at. [ 63 ] In Aristophanes ‘s comedy The Clouds, “ Mr. Good Reason ” gives the character Pheidippides a description of the ideal youth : “ A glitter thorax and glowing bark / Broad shoulders, a small tongue /A mighty bottom and a bantam prong. ” [ 64 ] In Greek mythology, Priapus, the god of fertility, had an impossibly large penis that was always permanently erect. [ 65 ] [ 59 ] Priapus was widely seen as hideous and unattractive. [ 65 ] A scholion on Apollonius of Rhodes ‘s Argonautica states that, when Priapus ‘s mother Aphrodite, the goddess of love and smasher, gave parturition to him, she was so horrified by the size of his penis, his massive pot, and his huge tongue that she abandoned him to die in the wilderness. [ 65 ] A herder found him and raised him as his son, [ 65 ] late discovering that Priapus could use his massive penis to aid in the emergence of plants. [ 65 ] however, there are indications that the Greeks had an open mind about big penises. [ 59 ] A statue of the god Hermes with an exaggerated penis stood outside the chief gate of Athens [ 59 ] and in Alexandria in 275 BC, a emanation in honor of Dionysus hauled a 180-foot penis through the city and people venerated it by singing hymn and reciting poems. [ 59 ] The Romans, in contrast to the Greeks, seem to have admired bombastic penises [ 59 ] [ 62 ] and large numbers of big phalli have been recovered from the ruins of Pompeii. [ 59 ] Depictions of Priapus were very popular in Roman erotic art and literature. [ 59 ] [ 62 ] Over eighty obscene poems dedicated to him have survived. [ 59 ] Penis size is alluded to in the bible : [ 59 ]
18 And she revealed her whorings, and she revealed her openness, and so I turned from her just as I turned from her sister. 19 Yet she increased her whorings, recalling the days of her childhood when she was prostituted in the kingdom of Egypt. 20 And she lusted after her male lovers whose genitalia were the genitalia of male donkeys and their seminal emission was the germinal emission of horses. Ezekiel 23:18-20 Lexham English Bible
Ancient Chinese legend holds that a man named Lao Ai had the largest penis in history and that he had an matter with Queen Dowager Zhao ( c. 280–228 BC ), the mother of Qin Shi Huang, by pretending to be a eunuch. [ 59 ] Ancient Koreans admired large penises and King Jijeung ( 437–514 AD ) of the Silla Dynasty is said to have had a forty-five-centimeter penis that was so large his subordinates had to search for a charwoman that fit him. [ 59 ] Traditional Japanese erotic paintings normally show genitals as hyperbolically big. [ 59 ] The oldest acknowledge paint of this type, found in the Hōryū-ji Temple in Ikaruga, dates to the one-eighth century AD and depicts a fairly large penis. [ 59 ] The ancient indian intimate treatise Kama Sutra, primitively written in Sanskrit, probably between the second gear and fourthly centuries AD, divides men into three classes based on penis size : “ hare ” size ( 5–7 curium when erect ), “ talk through one’s hat ” size ( 10–15 curium ), and “ knight ” size ( 18–20 curium ). [ 59 ] The treatise besides divides women ‘s vagina into three sizes ( “ deer ”, “ mare ”, and “ elephant ” ) [ 59 ] and advises that a man match the size of the vagina of the woman he is having sexual activity with to the size of his own penis. [ 59 ] It besides gives medically doubtful advice on how to enlarge one ‘s penis using wasp stings. [ 59 ]
Middle Ages and Renaissance
Portrait of Lodovico Caponi (painted c. 1550–1555) by  Larger codpieces were regarded as more fashionable. ( painted1550–1555 ) by Angelo Bronzino shows a codpiece peeking from underneath the youthful man ‘s jacket.Larger codpieces were regarded as more stylish. In chivalric Arabic literature, a longer penis was preferred, as described in an Arabian Nights fib called “ Ali with the big Member ”. As a witty sarcasm of this fantasy, the 9th-century Afro-Arab generator Al-Jahiz wrote : “ If the length of the penis were a sign of honor, then the mule would belong to the Quraysh “ ( the tribe to which Muhammad belonged and from which he descended ). [ 66 ] [ 59 ] The medieval Norsemen considered the size of a man ‘s penis as the measure of his manfulness, [ 67 ] and a thirteenth-century Norse charming amulet from Bergen, a wooden staff inscribed with publish in runic handwriting, promises its wearer : “ You will fuck Rannveig the Red. It will be bigger than a man ‘s prick and smaller than a cavalry ‘s prick. ” [ 67 ] A former fourteenth hundred account of the life sentence of Saint Óláfr from the Flateyjarbók describes a heathen ritual which centered around a preserve horse ‘s penis used as a cult artifact [ 67 ] which members of the cult would pass around in a circle, [ 67 ] making up verses in praise of it, [ 67 ] encouraging it and the other members of the group to behave in sexually suggestive ways. [ 67 ] During the Renaissance, some men in Europe began to wear codpieces, which accentuated their genitals. [ 59 ] There is no mastermind attest that it was inevitably worn to enhance the apparent size of the wearer ‘s penis, [ 59 ] but larger codpieces were seen as more stylish. [ 59 ]
Males may quite easily underestimate the size of their own penis relative to those of others. A survey by sexologists showed that many men who believed that their penis was of inadequate size had average-sized penises. [ 68 ] Another discipline found sex education of standard penile measurements to be helpful and relieving for patients implicated about small penis size, most of whom had wrong beliefs of what is considered medically convention. [ 69 ] The study found that about all of their patients that were concerned about their penis size overestimated the average penis size. The perception of having a bombastic penis is much linked to higher self-esteem. [ 70 ] Fears of shrivel of the penis in folklore have led to a type of mass craze called penis panic, though the penis legitimately can shrink in size due to scar tissue formation in the penis from a aesculapian condition called Peyronie ‘s disease. [ 71 ] [ 72 ] Marketers of penis expansion products exploit fears of insufficiency, but there is no consensus in the scientific community of any non-surgical proficiency that permanently increases either the thickness or distance of the tumid penis that already falls into the convention range .
Shrinking and enlarging
widespread private concerns related to penis size have led to a number of folklore sayings and popular acculturation reflections related to penis size. Penis panic is a shape of mass hysteria involving the believed removal or shrinking of the penis, known as genital retraction syndrome. The penis can importantly shrink ascribable to scar tissue formation from a condition called Peyronie ‘s disease which affects up to 10 % of men. [ 73 ] Products such as penis pumps, pills, and other doubtful means of penis enlargement are some of the most market products in electronic mail spam. At stage there is no consensus in the scientific community of any non-surgical technique that permanently increases either the thickness or duration of the tumid penis that already falls into the convention range ( 4.5 ” to 7 ” ). [ 74 ]
Among male homosexuals
A study undertaken at Utrecht University found that the majority of gay men in the study regarded a large penis as ideal, and having one was linked to self-esteem. [ 75 ] One study analysing the self-reported Kinsey data set found that the average penis of a homosexual man was larger than the average penis of their heterosexual counterparts ( 6.32 inches [ 16.05 centimeter ] in length amongst gay men versus 5.99 in [ 15.21 curium ] in heterosexuals, and 4.95 inches [ 12.57 curium ] circumference amongst homosexual men versus 4.80 in [ 12.19 centimeter ] in heterosexual men ). [ 76 ] [ 77 ]
The homo penis is thicker than that of any other archpriest, both in absolute terms and proportional to the rest of the body. [ 78 ] early research, based on inaccurate measurements, concluded that the homo penis was besides long. In fact, the penis of the common chimpanzee is no shorter than in humans, averaging 14.4 curium ( 5.7 inches ), and some other primates have comparable penis sizes relative to their body weight. [ 79 ] The evolutionary reasons for the increased thickness have not been established. [ 80 ] One explanation is that blockheaded penises are an adaptation to a correspond increase in vaginal size. The vaginal canal is believed to have expanded in humans to accommodate the larger size of a newborn ‘s skull. Women may then have sexually selected men with penises large enough to fit their vagina, to provide sexual stimulation and ensure ejaculation. [ 80 ] other evolutionary hypotheses to explain humans ‘ relatively big penis length and cinch include a sperm competition guess and a mate rival guess. The sperm contest hypothesis does not have much support as in other mammals where sperm rival is present, larger testes evolve, not larger penises. The mate contest hypothesis involves the prediction that a human with a larger penis would be able to displace the sperm of another. Studies have found that larger penises do not displace other sperm more efficaciously than smaller penises, but rather longer penises may ejaculate sperm inside the vagina in places that would be harder for a come penis to displace. The depth of pelvic thrust was correlated to the shift of competing sperm. [ 81 ]