Or is this a sexual thing, like male birds having pretty colors to attract the females, but in reverse. Did men get so self-conscious at some point that they said, "What a second! If I cover this up, the females won't know what kind of package I've got and I can score easier!" Or something.
I've seen this posited as a serious hypothesis on a documentary about human sexuality.
no subject
I've seen this posited as a serious hypothesis on a documentary about human sexuality.