A guy asked a girl in a library, "Do you mind if I sit beside you?"
The girl answered with a loud voice, "I DON'T WANT TO SPEND THE NIGHT WITH YOUUU!!"
All the students in the library started staring at the guy and he was embarrassed. After a couple of minutes the girl walked quietly to the guy's table and she told him, "I study psychology and I know what a man is thinking. I guess you feel embarrassed right?"
The guy responded in a loud voice, "$200 FOR JUST ONE NIGHT!!!? THAT'S TOO MUCH!!!"
...and all the people in the library looked at the girl in shock and the guy whispers in her ear, "I study Law, and I know how to make someone feel guilty."