Quote from Phoebe in The One with the Hypnosis Tape
Frank: Alice, uh she, uh, called it off. Phoebe: Oh, no. Did- Did she say why? Frank: Uh, no, not really. Just that I was too young, you know. But I don't see how I could all of a sudden be too young, 'cause I'm older than I was when we first got together.