D*2
发帖数: 51 | 1 https://en.wikipedia.org/wiki/Human_penis_size
"As of 2015, a systematic review of 15,521 men, and the best research to
date on the topic, as the subjects were measured by health professionals,
rather than self-measured, has concluded that the average length of an erect
human penis is 13.12 cm (5.17 inches) long, while the average circumference
of an erect human penis is 11.66 cm (4.59 inches)."
Size and race
"The belief that penis size varies according to race is not supported by
scientific evidence.[6][22] A 2005 study reported that "there is no
scientific background to support the alleged 'oversized' penis in black
people".[23] In fact, a study of 253 men from Tanzania found that the
average stretched flaccid penis length of Tanzanian males is 11 cm (4.53
inches) long, smaller than the worldwide average, stretched flaccid penis
length of 13.24 cm (5.21 inches), and average erect penis length of 13.12 cm
(5.17 inches).[24]
A study of 115 men from Nigeria found that the average flaccid stretched
penis length of Nigerian males is 13.37 cm (5.26 inches) long, which is near
identical to the worldwide average, stretched flaccid penis length of 13.24
cm (5.21 inches) and average erect penis length of 13.12 cm (5.17 inches).[
25] A 2015 systematic review found that it was not possible to draw any
conclusions about size and race from the available literature and that
further research needed to be conducted.[1]" | d******w
发帖数: 2213 | 2 除了average， 还有个指标就是黑人中是否见到大鸡鸡（或者小鸡鸡)的比例更高?没有
研究publish这个数据。JJ跟智商一样，大家都只叹服最大最高的。 |
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