Pound of Flesh (2015)Nude, butt, shirtless, straight 00:08:00 Van Damme ass in both the present and a flashback, though we don't know how he manages to keep his dick out of frame!
In Praise Of Older Women (1978)Nude, butt, shirtless, straight 00:30:43 Tom has some sensual sex with a cougar. With the help of a bedroom mirror you can see Tom's butt.