I can't find it now but I read a story, in I think in https://old.reddit.com/r/tifu, about a man and woman having sexy fun times. The woman's thighs were wrapped around the guy's head, she orgasmed, her legs spamsed, and because of the sweat her thighs formed a vacuum seal on both his ears and ruptured one or both of them.

There are plenty of other stories about ruptured ear drums though: https://old.reddit.com/r/tifu/search?q=eardrum&restrict_sr=o....