A guy is looking for a place to sit in a crowded university library. He
asked a girl: "Do you mind if I sit beside you?"
The girl replied in 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 in a loud voice:

"$500 FOR ONE NIGHT? . . . THAT'S TOO MUCH! YOU’RE NOT WORTH IT!"

All the people in the library looked at the girl in shock.

The guy whispered to her: "I study law, and I know how to screw people."