Jessica Alba has always said she won’t do nudity, but I guess getting your naked buttocks spanked by Casey Affleck doesn’t count for nudity in her book. This very NSFW clip of Jess getting a belt-whopping from her upcoming flick The Killer Inside Me hit the net Wednesday.

A crime drama about a Texas deputy sheriff is slowly unmasked as a psychotic killer – starring Jessica, Casey, Simon Baker, Kate Hudson and Bill Pullman. I’m surprised that Jess is getting top billing over Affleck. Although she’s a tabloid favorite, industry insiders call her a C-lister.