Quote from Phoebe in The One Where Rachel Finds Out
Ross: Is Rachel here? I wanted to wish her a happy birthday before I left. Monica: Oh, no. She's out having drinks with Carl. Ross: Oh. Hey, who's Carl? Monica: You know that guy she met at the coffeehouse. Ross: No. Phoebe: Oh, well, you see, there's this guy she met at- Ross: The coffeehouse? Right. Phoebe: So you do know who he is.