Humpday (2009)

When Andrew unexpectedly shows up on Ben's doorstep late one night, the two old college friends immediately fall into their old dynamic of heterosexual one-upmanship. To save Ben from domestication, Andrew invites Ben to a party at a sex-positive commune. Everyone there plans on making erotic art films for the local amateur porn festival and Andrew wants in. They run out of booze and ideas, save for one: Andrew should have sex with Ben, on camera. It's not gay; it's beyond gay. It's not porn; it's an art project. The next day, they find themselves unable to back down from the dare. And there's nothing standing in their way - except Ben's wife Anna, heterosexuality, and certain mechanical questions.