Previous surveys of penis size were not very accurate due to men who were prone to exaggerate the size of their penis. That is why scientists decided to collect data from doctors.
15521 men all around the world were asked to measure their penis`s length. Which helped scientists to measure average lengths and build a statistical distribution of different penis`s lengths. Turns out, an average length of flaccid penis is 9,16 centimeters. Erect — 13,12 centimeters.
Scientists also have built a statistical distribution of penis`s sizes.
The results showed that a penis 16 centimeters long is very rare and only 5 of every 100 men have that length. And vice versa, a penis less than 10 centimeters is rare too.
According to the survey, the length of a penis does not depend on a body structure of a man (height, shoe size). Also, they didn`t find any connections between the race of a man and the length of his penis.