Penis Facts You Didn't Learn in Sex Ed Class

By the time a guy becomes an adult, he may think there are no new penis facts left to learn. After all, between that boring sex ed class (which did feature a few good pictures, it's true) and his own experiments and bull sessions with other guys, it may seem like there's nothing left to know. But that's not always so, and some of the things one can still learn can have an impact on one's ongoing good penis health. More ...