With a full erection, too. The Budget For X-men: Thom Fitzgerald's "Beefcake" Joe Dallesandro still looks good in this film. Click Here for a sample. That scene from Ken Park is incredibly hot, especially the end when the cum is dripping off his cock. He may not be the most traditionally, stereotypically handsome guys, but he's red hot on screen.
There's a Latin film called Four Moons that has full frontal in a bathhouse scene but no real sex or any erections.
Movies with explicit male nudity
R25, his name is Mark Rylance who was so fucking sexy in the film. Don't remember there being any more nudity but this scene is hot. Shortbus owns this thread. I'm halfway through Taxi Zum Klo and it's full out porn. Alan Bates and Oliver Reed: