Quote from Frasier in Daphne Does Dinner
Frasier: I will need a ramekin for each of your guests. Daphne: Here we are. Frasier: Oh, dear. This is bad. Daphne: What? Frasier: Well, there are two that are mis-matched. It's all right if they're all mis-matched or if in pairs, but two is just unheard of.