Human Penis

I am not an anthropologist or sexologist, but being a curious person like you and me, I ask why only human penis is extrude outside our body not like other mammal hiding inside a cavity. Penis being outside thus give a vision appearance, especially human being less hairy than animals.

Initial I though it is to impress the female, but then we all know that female is not that visually attracted to sex organ when come to sex, in fact man is, and when come to big penis, most female find it is more painful than pleasure; so the penis is to show other male rivals telling them I got bigger tool, piss off.

And above claim is not mine, I read a scientific report somewhere sometimes ago.

Being gay, I too admire penis. I find flaccid penis some how cute, I enjoy seeing as well as touching cute penis, and see it become a "monster" - oh well big or small monster ;p

I am not sure about my readers.