Quote from Ross in The One with Rachel's Big Kiss
Rachel: That was my friend, Melissa, from college. Ross: She seems really, really fun! Rachel: She's actually very sweet, and we used to be very close. Monica: Wait a minute. She's not the one who you? Joey: Who you what? Who you what? Rachel: Yes. Monica: Wow! Joey: Wow, what? Who you what? Rachel: Oh, it's not a big deal. Monica: They were lovers. Joey: What? Ross: What? Rachel: No, we weren't. It was nothing. It was one night, senior year, and we went to a party had a lot of sangria, and you know, ended up kissing for a bit. Ross: So that's two of my wives.