Quote from Chandler in The One with Phoebe's Ex-Partner
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?