Rachel: Monica, is this true?
Joey: Of course, it's true. How else would you explain all the weird stuff that's been going on?
Monica: Yes, it's true.
Rachel: Okay, but if it only happened that one time, how come we found your underwear in our apartment the other day?
Joey: That was the underwear I was wearing that night in London. Right, Monica?
Monica: I guess I wanted to keep it as a souvenir.
Ross: My God, Monica!