This isn’t based on any one experience, but the collective experience of professors I know who seem to have the same students enroll in their classes semester after semester despite failing. You’d think they would try someone else.
BEARD: You're mad you can't help him?
HOBO: No, I'm mad he isn't catching the hint!
KEANU: Every semester I sign up for this professor to torture him for failing me three years ago. When do you think he'll get the hint and just pass me?