It's a Nice Haircut, Too

Chick: Good-bye [departs train].
Guy #1: Good-bye.
Guy #2: Eddie*, your sister is really pretty.
Guy #3: Don't call her that -- 'pretty' is something you say about nice girls, not whores like that.
Eddie: What are you talking about?
Guy #3: Ed, don't take it out on me, but at Dave's birthday party your sister was in the bedroom working for 10 dollars.
Eddie: ... I'm gonna kill Dave. Why didn't you tell me about this?!
Guy #3: Because she was right there! [Silence, then Eddie departs.]
Guy #2: 10 dollars? What's her phone number? I've got 10 dollars.
Guy #3: I know, best 10 bucks I ever spent.

--D train