This experimental study used life-sized and screen-based 3D male avatars to test how penis size, height, and body shape ...

“While the human penis functions primarily to transfer sperm, our result suggests its unusual large size evolved as a sexual ...

There are a lot of myths, rumors and misconceptions out there about the male, um, package. And since some of us are too shy to ask guys the truth (or do a little investigation!) we’ve researched the ...