Fascinating and extremely creepy scene from The Night Porter (Italian: Il Portiere di notte). A controversial 1974 film by Italian director Liliana Cavani, starring Dirk Bogarde and Charlotte Rampling.
Dirk Bogarde plays Maximilian Theo Aldorfer, a former Nazi SS officer, and Charlotte Rampling plays Lucia Atherton, a concentration camp survivor who has been tormented by Aldorfer. Thirteen years after World War II, Lucia meets Aldorfer again; he is now the night porter at a Vienna hotel. There, they fall back into their sadomasochistic relationship.