You were famous in university for bullying people who were weaker than you. You bullied too many people until you finally found something wrong with the person you bullied this time

He's Paul, the guy you've been bullying lately. He's a little weird. You didn't know Paul was actually a masochist. Because you feel weird, so you start to stop bothering him

"Why don't you bully me? Come on, bully me one more time, you can torture me more than this"