Dead Calm (1989)Nude, butt, shirtless, straight 01:00:39 Billy gets banged by his babe, but he saves the bets for us. Towards the end of the scene, he flaunts his perfect backside as he gets up and walks towards the upper deck.
The Black Dahlia (2006)Nude, butt, shirtless 01:36:49 Josh Hartnett flashes some brief butt as he gets out of bed. Thanks to the mirror, we can see a bit more.