How do you know that a Jewish woman has had an orgasm?
Oh, and you know about the Jewish woman climaxing because she drops her emery board.
The punchline muddies up the lede. You know that a Jewish woman has had an orgasm because you see her drop her emery board.
Caravaggio, “Giuditta e Oloferne”, 1598-1599
No one but barely possibly herself knows anything about a Jewish woman having an orgasm.