This is from the 1976 classic Water Power. It's a lot like Taxi Driver, except this Travis Bickle has a little fetish for forcing woman into doing enemas at gun point. The film is actually based on real crimes committed by an Illinois man dubbed the "Enema Bandit". Anyway he's dead now, so R.I.P you scat-loving motherfucker.
Initially she makes it pretty clear that she doesn't want anything in her ass. But our hero Johnny Cock Rocket uses the powers of persuasion and before you know it he's making sweet love to her festering cornhole. Not exactly fap worthy but if you're like me you'll fap anyway.
