J.D.: All right, fine, what do you think Gregory's doing right now?
Murray: Probably playing his stupid guitar.
[meanwhile, Mr. Marks is talking to Dr. Cox as he strums his guitar:]
Mr. Marks: Ah, so maybe I wasn't the perfect dad. I mean, there were the occasional missed baseball games. And the taking of his college sweetheart to the Bahamas for two weeks without telling him. But I still don't see why he resents me this much.
Dr. Cox: Boy, tell me about it. You know, I got this kid who constantly ignores my advice, and then flashes me the sad doe eyes every time I call him a girl's name or scream in his face.
Mr. Marks: Do you wanna sing about him?
Dr. Cox: No. Not ever.