As seen in: Re-Animator (1985)

Speaking of gory sexcapades, the cult classic Re-Animator similarly features a wounded star getting lucky. In this case, an unfortunate fiancee ends up getting cunnilingually assaulted in a morgue by the vengeful severed noggin of a dude who was decapitated, then brought back to life by the freaky med student that her man rents a room to. And you thought you'd experienced bad head.