Yup, Lars von Trier is back at it. This 2013 film starring Charlotte Gainsbourg, Stellan Skarsgård, Shia LaBeouf, Christian Slater, Uma Thurman, and Willem Dafoe (among others) featured unsimulated sex per usual—but there's a catch. The actors simulated sex, and then body doubles had IRL sex, and their genital area was superimposed on the actors. #Normal. Also, apparently some prosthetic vaginas were floating around set.