Cord (2015)

Cord (2015) takes place in a post-apocalyptic world in which survivors live underground. The unhealthy conditions underground have made sex dangerous. Masturbation is now the norm and a series of technical devices emerge to help people masturbate rather than touch each other. Czuperski is a dealer of these machines and he makes a deal with Tania (Laura De Boer), a sex addict: she will be his human guinea pig so that she can receive pleasure. But this business relationship goes too far. 

The sexy Christian Wewerka defies the norms of this dystopian world by banging a girl in the basement and showing off his bare buns to do it. Michael Schumacher joins in to show off his balls, butt, and cock in order to get off with a little bit of cock-torture. Literally! Christian also gives off full nudity to the camera as he defecates into a glass bowl. Hey, we never said things were clean in this movie. It's gritty nudity through and through.