Answers

2014-11-21T07:05:55+05:30
They aren't.Chimps and gorillas(just to name a couple) also have visible genitals.Just the difference is humans are larger than other primates(in that area lol) so they are more visible.
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2014-11-21T07:40:01+05:30
THERE IS A LITTLE MISTAKE IN QUESTION.
chimpanzees and gorillas are also having primates with visible genitals.
the genitals in human are much larger than those animals listed above
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