Quote from Chandler in The One with Phoebe's Wedding
Ross: So? What did you decide? Phoebe: I decided to pee. Chandler: Mike didn't tell you? You have to choose one of us to be in your wedding. One of the groomsmen fell out. Phoebe: Oh, no, no. I can't choose between you two. I love you both so much. Chandler: Just not enough to put us in the original wedding party.