Noel Clarke in The Anomaly (2015)

The Anomaly centers on Ryan Reeve (played by Noel Clarke) a former soldier who finds himself in a fight for his life, with only a few brief minutes to piece things together before his mind is sent into a parallel existence. In addition to his starring role, Noel also directed the film and like any good director he got his leading man naked. He gets several opportunities to show off his butt after his character wakes up in the middle of having sex. He tries to get oriented to what's happening and learn more about the woman in his bed, all while naked. Unfortunately, he keeps his co-star Ian Somerhalder completely covered up for the film.