Bitter Moon 1992

Bitter Moon is a mainstream 1992 bdsm film from Roman Polanski. When this film came out no one knew what to make of it but as Polanski had assembled a pretty well-known cast it couldn't just be ignored. The main cast is made up of Hugh Grant, Kristin Scott Thomas, Peter Coyote and Emmanuelle Seigner who is Roman Polanski's wife. Even now Wikipedia describes it as an "erotic romantic thriller" which seems to be a genre it has all to itself.