Quote from Joey in The One with the Secret Closet
Joey: What are you doing? Chandler: Monica has a secret closet and she won't let me see what's in it. Joey: Why not? Chandler: I don't know. What could she possibly be hiding in here that I can't see? Joey: I don't know. Ooh, I'll bet it's Richard. Chandler: Why would Monica be keeping Richard in here? Joey: Well, off the top of my head maybe she's having her cake and eating it too. You being the "cake," Richard being the "too."