In the university library, a boy walked up to a girl and asked, "Excuse me, is anyone sitting here?"
The girl deliberately raised her voice and responded in a gossipy tone, "I'm not going to sleep with you, okay?"
Everyone in the room looked at the boy, who was incredibly embarrassed.
The girl continued in a softer voice, "I didn't say anything wrong, did I? There are plenty of empty seats, but you insist on sitting here. You obviously want to hit on me. I study psychology, and I know how to read people very well."
Suddenly, the boy shouted, "What? You charge 30,000 dollars for one night? Do you think you're a celebrity?"
The girl's face turned red, and her classmates started whispering to each other.
The boy then whispered to the girl, "I study politics, and I know how to ruin someone's reputation.