Quote from Niles in The Show Where Woody Shows Up
Frasier: So, what brings you to Seattle? Woody: My cousin's getting married. Frasier: Really? Niles: Which is your cousin, the bride or the groom? Woody: Actually, both are. Niles: I assume they're kissing cousins? Woody: Ho, they're doing a lot more than that. That's why they have to get married.