Sex scenes in movies have often stirred debate, with fans discussing at length whether actors had real-life sex or were faking it. Some actors have held their hands up in pride and others deny anything other than acting.
Check out sex - sorry, six - films below which have stirred debate and tell us which of them you think contain real-life hanky-panky...
The sex was real in 9 Songs, Michael Winterbottom's 2004, which film is often said to be the most sexually-explicit mainstream film ever released.
Antichrist director Lars Von Trier included real sex between stars Willem Dafoe and Charlotte Gainsbourg in this film
The Postman Always Rings Twice reportedly saw Jack Nicholson and Jessica Lange have sex for real
Sienna Miller has denied it, but an on-set insider claimed that the sex scenes between Miller and on-screen (and reportedly off-screen) love interest Hayden Christensen in Factory Girl were very real
"It's not about sex it's about sexuality," claims the trailer for Shortbus, a film full of real-sex.
Béatrice Dalle and Jean-Hugues Anglade were rumoured to have had sex in this 1986 French film.