MTV Star's Driver's Education

JACKASSES Margera, Rothstein, and Leto (inset) If you're one of the moviegoers who helped propel his most recent film to $84,517,957 in worldwide box office earnings, you already knew that skateboarder and reality show star Bam Margera is a Jackass. But what you might not know is that his most dangerous stunt involves having sex with his fiancée while driving.

In an appearance on Howard Stern's Sirius Satellite Radio show this morning, the Jackass and his betrothed, Missy Rothstein, shared their secret for keeping their relationship fresh. "I figured out a way to hump while I'm driving!" Margera enthused. "I'll just be like, 'Let's just bang out right now!'... I live in the woods, man, so I can drive all over the place. It's way better than the bed."