From what I read, and I'm no scientist, and I don't know the reliability of the content- But some species of apes have very very fine hair around their genitals, that could be defined as such, but is more of a thinning and change in texture (compared to their body hair). I guess this could go either way, answer wise. Scientists might argue that we evolved form those apes, and our bodies developed that thicker hair as a sort of protection (though isn't it the cause and breeding ground of so many STDs?) Or perhaps more modern humans manually removed the hair and the bodies adapted, kind of like how we shave our legs/face and the hair comes in thicker. Or maybe the whole faith based, modesty/shame connection. I will keep searching until I find legit answers on either side of the spectrum. Wonder what my friends pastor might say?