Quote from Ross in The One with the Boobies
Monica: Wait! Go back to that "sibling" thing. Roger: Well, I don't know. It's conceivable that you wanted to sabotage your marriage so the sibling would feel like less of a failure in the eyes of the parents. Ross: [high-pitched squeal] That's ridiculous! I don't feel guilty for her failures. Monica: Oh, so you think I'm a failure? Phoebe: lsn't he good? Ross: Yeah. No, that's not what I was saying. Monica: You know, all these years I thought you were on my side. But maybe what you was doing was sucking up to Mom and Dad so they'd keep liking you better. Ross: Hey, I married a lesbian to make you look good!