Quote from Frasier in Space Quest
Roz: What, you don't talk to your dad like that? Frasier: Hardly. We hardly speak at all. Roz: Really? Frasier: Well, you know, we're not really very similar people. In fact, my brother and I are a lot more like my mother. You know, if it wasn't biologically impossible, I'd swear that Dad was dropped in a basket on our doorstep.