Sex addiction. “Isn’t that just something that guys say when they get caught cheating?” Now that life-straining, family-ruining blight on American society has its own comedy feature in Thanks For Sharing. Stuart Blumberg’s directorial debut follows three addicts as they wade through a 12-step recovery program and try to manage actual romantic relationships. Written by Blumberg and Matt Winston, the film stars Mark Ruffalo, Tim Robbins, Gwyneth Paltrow, Josh Gad, Joely Richardson, Patrick Fugit and Alecia Moore. Lionsgate and Roadside Attractions, who teamed to acquire the pic after its premiere at last year’s Toronto International Film Festival, open it September 20. Watch the first trailer here: