The results "directly contradict claims that penis size is
unimportant to most females", and also hint at why human males tend
to have relatively larger genitalia when compared to other
primates, the study said.
"Our results show that female mate choice could have played a
role in the evolution of the relatively large human male penis,"
the authors wrote.
"Before clothing, the non-retractable human penis would have
been conspicuous to potential mates."
The study did not get into the racial background of men and
whether that may affect penis size, but it did document the
ethnicity and age of the women it was studying for hints about
whether penis size mattered.
More than 70 per cent of the women were of European origin, 20
per cent were Asian and seven per cent were from elsewhere. Their
average age was 26.
