There's that site dedicated to ridicule of the mullet haircut and lifestyle, and one phrase I read in there a couple of years ago has stuck with me. It was a fictional profile of a mullet head who listed, among his favorite activities, "****ing ****es in the *****er." Now, I assumed that the *****er was the facility, and I think I've heard it used as such. But recently I realized that the *****er might instead be the orifice. That makes it less funny, but still notable. And I wondered if this is how linguistic drift happens, because someone such as myself gets something slightly wrong.