It’s tough to believe that Sex Drive originated as a book (All The Way by Andy Behrens) — its themes of horny teens, wisecracking friends and an ultimately schmaltzy “your-first-time-should-be-special” message seem torn from the pages of teen scripts dating back further than American Pie.

Sex Drive concerns young Ian (Josh Zuckerman), a meek nice-guy whose idle online romancing becomes a quest to get laid thanks to pressure from his oversexed, baby-faced best friend Lance (Clark Duke). Slumming, Duke does what he can with a character so off-putting he’s more of a bummer than amusing. That leaves it up to the plethora of comic cameos (Seth Green, David Koechner, Brian Posehn) to add a few laughs, but Sex Drive’s botched attempt to combine sweetness with dirtiness doesn’t make for a smooth ride.