I once saw a Farrah Fawcett movie where the frontier wife was dying and hunted up a new bride for the husband and kids. All she could find was Farrah, a whore in town. Husband was amenable and everything went forward as expected. Later Farrah was trying to teach the kids math and all she could do was instantly calculate 15% of any sum since that was her take at the whorehouse.
It wasn’t a bad movie.