The Joker of Love(1987)

Since Desiree has been in a relationship with Tobias Schock, a building contractor who is struggling with his business, the relationship has worked according to the motto "They fucked and they beat each other. But if there's been stress again, everyone still gets his strokes: Taking turns on the fly with their friend Kathrin, who only really gets going after anal insertion, they both test the tight masts of tangible German craftsmanship. The tough guys on Schock's construction site and in a car repair shop are only too happy to unpack their syringes. Schock finds solace with his hot-blooded secretary and in a kinky romance with a teenager - before his girlfriend stretches out her soft parts for him again!