Chandler: Well, hello.
Joey: Where you been?
Chandler: The doctor.
Ross: Is everything okay?
Chandler: Oh, yes. Just had me a little nubbin-ectomy. Yep, two nipples, no waiting.
Monica: Well, just like Rachel in high school.
Rachel: What?
Monica: Come on, I was kidding! It was such an obvious joke.
Chandler: That was an obvious joke. And I didn't think of it. Why didn't I think of it? The source of all my powers. Oh, dear God, what have I done?