Quote from Jerry in The Yada Yada
Beth: What was that all about? Jerry: Oh, I said something about dentists and it got blown all out of proportion. Beth: Hey, what do you call a doctor who fails out of med school? Jerry: What? Beth: A dentist. [they laugh] Jerry: That's a good one. Dentists. Beth: Yeah, who needs them? Not to mention the Blacks and the Jews.