Alfred Hitchcock loathed having to abide by the Puritanical "Hayes Code" that, in effect, acted as a de facto censorship board for American films. Hitch devised numerous clever ways to introduce adult sexual situations into his films in a manner that made it difficult, if not impossible, for the prudes to order scenes trimmed or deleted. Hitch lost a few battles (ironically one them based on a non-sex scene involving the flushing of a toilet!) but generally managed to get one over on the would-be censors. Click here for an article from The Richest web site that examines some his tactics for including sex in his movies (although the article fails to examine "Marnie", perhaps the most sexually driven of all Hitchcock's films.)