A guy approached a girl at the college 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 decided to sit at another table.
After a couple of minutes, the girl walked quietly over to the guy's table and said:
"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: "$500 FOR ONE NIGHT? THAT'S FAR TOO MUCH!"
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."