If you felt that Fifty Shades of Grey was lacking bite and authenticity, check out five S&M movies that were so extreme they struggled to disseminate Sado-masochism to the masses...
1. The Night Porter
The inimitable Charlotte Rampling stars as a holocaust survivor who becomes embroiled in an S&M dynamic with her former torturer. The premise is about as shocking as a movie can handle but Rampling - opposite a striking Dirk Bogarde - handles the dark material with aplomb.
Gerard Depardieu vs the professional dominatrix in a French arthouse picture that stretched the censors to their limit, with depraved dungeon action earning the movie an X that was only downgraded in 2003.
3. Preaching To The Perverted
America Psycho screenwriter Guinevere Turner menaces the camera as a dominatrix in London's kinky clubland underworld. If the pitch doesn't convince, try the superlative sell from Empire:
“Turner makes Sharon Stone look like a mother superior.”
4. The Piano Teacher
Despite her frosty exterior, Grand Dame of French cinema Isabelle Huppert discovers the illicit thrill of self-inflicted cutting while pursuing a young sexual partner. One of Michael Haneke's finest and most uncomfortable films.
5. Venus In Fur
Roman Polanski's movie adaptation of the David Ives play sees Emmanuelle Seigner exercise - or should that be exorcise? - her erotic powers in a paeon to female dominance. Leopold von Sacher-Masoch would be proud.