A very shy guy sees a beautiful woman sitting at the bar.

After an hour of gathering up his courage he finally goes over to her and asks, “Can I buy you a drink?”
The woman yells at the top of her lungs, “No, I won’t sleep with you tonight!” Everyone in the bar is now staring at them.
The guy slinks back to his table. After a few minutes, the woman walks over to him and says, “I’m sorry if I embarrassed you. I’m a graduate student in psychology and I’m studying how people respond to embarrassing situations.” ANd the guy says, “What do you mean $200?”