A guy is looking for a place to sit in a crowded library. He asked a girl in a university library: "Do you mind if I sit beside you? The girl replied with a loud voice: "I DON 'T WANT TO SPEND THE NIGHT WITH YOU!" All the students in the library started staring at the guy; he was truly embarrassed and moved to another table. After a couple of minutes, the girl walked quietly to the guy's table and said with a laugh "I study psychology, and I know what a man is thinking. I guess you felt embarrassed, right? The guy then responded with a loud voice: â£500 FOR ONE NIGHT. THAT'S TOO MUCH!â All the people in the library looked at the girl in shock. The guy whispered in her ear: "I study law, and I know how to screw people".