2. Sado-Masochism - In The Realm of the Senses
Nagisa Oshima's controversial though critically acclaimed In the Realm of the Senses is about a real incident that took place in Japan in the mid-1930s, when a woman murdered her lover. The tale begins as the pair begin experimenting with more and more dangerous sex, namely autoerotic asphyxiation, which, ahem,
climaxes with the woman strangling the man until he dies. Oh, but wait, that's not the end of it; she then chops off his todger with a knife and declares her love for him by writing it on his chest in his own blood. This is a film that takes sado-masochism to its most dangerous potential end, whereby the sexual pleasure gained from pain leads to death (likely as the person experiences the ultimate height of their fetish). Plenty of films have examined the fetish, though none in such a memorably disturbing manner.