The average human erect penis is about in length, the circumference is about . There is no scientific relation between either penis size or race, and shoe size or stretched penis size. At birth the penis is between , at the beginning of puberty, it is 6 cm. Penis size does not change much during adulthood.
A review about penis size was published in 2014 by Veale et al. This review analyzes many studies which published in past 30 years.
By this review the average length of soft(not erect) penis is 9.16cm, stretched soft penis length is 13.24cm, erect penis length is 13.12cm. And the average circumference of soft penis is 9.31cm and erect penis is 11.66cm.
In these studies erect penis length is measured from the root of the penis to the tip of the glans along the upper side of the penis. The fat pad at the root of the penis is pushed to the pubic bone. The circumference of the penis is measured at the base or mid-shaft of the penis.
Males may quite easily underestimate the size of their own penis compared to that of others because of looking down and the accumulation of fat at the base of the penis. Studies found that many men who believed that their penis was of inadequate size had average-sized penises. Sex education of penis measurements was helpful and relieving for men who were concerned about small penis size.
An Internet survey found only 15% of participating men were satisfied with their penis size, whereas 85% of participating women said they were "very satisfied" with the size of their partner's penis, and only 6% of women rated their partner as smaller than average. A study concluded that penis width, rather than length, was a more important factor of sexual stimulation probably because a wider penis provides more friction to the clitoral area, while a longer penis reaches a less sensitive area. At Utrecht University was found that the majority of homosexual men regarded a large penis as ideal, and having one was linked to self-esteem.
Widespread private concerns have led to a number of folklore sayings and popular culture reflections related to penis size. There is belief that it is possible to predict the size of someone's penis by observing other bodily features such as the hands, feet, nose or height. The media has equated a man's penis size with both power and masculinity. The perception of having a large penis is linked to higher self-esteem.
Many men exaggerate the importance of deep vaginal penetration in stimulating a woman to orgasm.
The most sensitive area of the female genitals includes the vulva, clitoris, and the section of vagina closest to the outside of a woman's body (). The vagina is roughly in length. The majority of penises are likely of sufficient length to fully satisfy their partners.
Some women find stimulation of the cervix by penis as uncomfortable or painful, others report it to be key to orgasm. The cervix may be confused with the deepest point of the vagina, above and below the cervix, respectively making it possible for there to be indirect and/or simultaneous stimulation between them. During arousal, the vagina lengthens rapidly to an average of about 10 centimetres, but can continue to lengthen in response to pressure. The walls of the vagina are composed of soft elastic folds of mucous membrane skin which stretch or contract (with support from pelvic muscles) to the size of the penis. With proper arousal, the vagina stretches or contracts to accommodate virtually any size penis, from small to large.
Ancient Romans admired the large penis of Priapus. Ancient Greek art was not obsessed with penis size. A passage from Aristophanes lists broad shoulders, tiny tongue, strong buttocks, and a little penis as the most desirable masculine features. In medieval Arabic literature, a longer penis was preferred, but Afro-Arab author Al-Jahiz wrote: "If the length of the penis were a sign of honor, then the mule would belong to the (honorable tribe of) Quraysh".
An adult penis with an erect length of less than , but otherwise formed normally, is referred to as having the micropenis condition. Some of the causes are deficiency of pituitary growth hormone and/or gonadotropins, mild degrees of androgen insensitivity, a variety of genetic syndromes, and variations in certain homeobox genes. Some types of micropenis can be addressed with growth hormone or testosterone treatment in early childhood. About 0.6% of males are in the micropenis condition.
It has been suggested that penis size differences between individuals may also be caused by environmental factors such as culture, diet, chemical/pollution exposure, etc. Endocrine disruptor resulting from chemical exposure has been linked to genital deformation in both sexes (among many other problems). Chemicals from both synthetic (e.g. pesticides, anti-bacterial Triclosan, plasticizers for plastics, etc.) and natural (e.g., chemicals found in tea tree oil and lavender oil)) sources in the blood of pregnant women have been linked to various degrees of endocrine disruption.
Various studies have examined condom breakage, which looked, among other things, at penis size as a factor for breakage or slippage. Although the most common type of condom, those made of latex, have great ability to stretch, they are vulnerable to dry friction (i.e., the dry rubbing motion of sexual activity when there is tight pressure or a lack of smooth lubricated movement) as well as other mistakes of usage. In a separate study of people practicing anal sex, condom breakage was linked more to excessive friction (in this case due to low usage of a sexual lubricant) than to penis size.Penis size did not influence slippage, but penis circumference and broken condoms were strongly correlated, with larger sizes increasing the rate of breakage. Men with macrophallism sometimes find it hard to find a condom that fits.
4. Who says the penis size is not important by Simon Chan
Shun Nagasawa
Shun Nagasawa (born 25 August 1988) is a Japanese football player. He plays for Shimizu S-Pulse.
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Scantron
Scantron is a company from Eagan, Minnesota, USA, that makes and sells machine-readable papers on which students mark answers to test questions, the machines to check those answers, survey and test scoring systems, systems for school attendance (with a mark meaning a missing student) and image-based data collection software and scanners.
A Scantron test scoring system is a multiple-choice, fill-in-the-bubble form. It can have different length and width, from one column, 15-answer tests, to several 8.5×11-inch pages used in standardized testing, such as the SAT and the ACT.
Students often use Scantrons on finals, midterms, standardized tests, such as the SAT and ACT, etc. Students fill in the appropriate bubble corresponding to their answer. Scantrons are then fed through a machine that grades them. The Scantron is a very progressive form of grading. It eliminates human error on the grader's behalf, and takes much less time.
The technology of this system dates back to the nineteenth century using optical mark recognition, telegraph lines, and punch tape. Students ranging from elementary school through college know how to use these forms. However, Learner Response Systems are becoming more popular in the college setting and may soon make scantrons a thing of the past.
Kara (South Korean group)