— People don't have arch-enemies.
— I'm sorry?
— In real life. There are no arch-enemies in real life. Doesn't happen.
— Doesn't it? Sounds a bit dull. What do real people have, then, in their "real lives"?
— Friends. People they know, people they like, people they don't like. Girlfriends, boyfriends.
— Yes, well, as I was saying, dull.