Whether it appears on a movie screen, in a magazine, or on a porn site, the naked female body is almost always meant to be titillating. So how come naked dudes are so often meant to be funny?
In a post embarrassingly rife with genital metaphors, PopWatch notes that male full frontal has become a joke du jour. The apparently dick-filled Hangover Part II is the most recent example. But even before Ed Helms was getting Mike Tyson's tattoo on his face, the male body was already something of a punchline. See for instance the Vanity Fair spoof photo of Jason Segel, Seth Rogen, and Jonah Hill, reclining "sexily" in nude bodysuits. Or Zach Galifinakis's bathtub and swimsuit pics. Or (as PopWatch also notes) every movie Will Ferrell is in. Even beefcake photos that are supposed to be sexy and not funny (Scott Brown's Cosmo centerfold comes to mind) often spark snickering.