In a relationship, one should conduct oneself with charm, wit, and grace.

Girl: Fuck you, you're fucking nothing. You're useless.
Guy: I'm not useless.
Girl: You are fucking useless! You're such a cunt, you fucking bitch ass, sleeping with some skank whore behind my back!
Guy: You are the skank whore!

-- Piccadilly, overheard by Jon