Here's an oldie but a goodie.... Thanks to Steven Wright
This guy gets onto a bus and sits next to this beautiful blonde Chinese girl.
He proceeds to start some small talk...
Guy: Nice day.
Girl: I guess...
Guy: What do you mean you guess??
Girl: Well actually, I'm not feeling too great at the moment.
Guy: Why don't you tell me your problems..
Girl: Why Should I? I don't know you!
Guy: Well sometimes it's good to tell your problems to a stranger on a Bus.
Girl: Ummm I guess so. It might make me feel better. Okay here goes... My shrink tells me that I'm a raving nymphomaniac and I can only make love to Jewish Cowboys! My name is Elaine by the way.
Guy: Nice to meet you Elaine. I'm Bucky Goldstein.
Boom Tish!