A shy man enters a bar

He sees a cute girl sitting at the bar and sits down near her. About an hour later he finally comes up to her and quietly asks her: -Excuse me miss, could I buy you a drink? The girl screams: -No! I am NOT having sex with you!! Everyone at the bar turns and stares at him. Humiliated, he walks away. A few minutes later the girl walks up to him and says: -I'm sorry I embarrassed you. See, I am a psychology student and I am observing human behavior in uncomfortable situations. The man turns and yells: -What do you mean for $200?!