Quote from Phoebe in The One with Ross's Denial
Rachel: Pheebs, I want to ask you something. Since I'm moving out, and you're so beautiful, how about I move in with you?
Phoebe: Well, that would be great, but then what do we do about Denise?
Monica: Who's Denise?
Phoebe: My roommate.
Rachel: You have a roommate?
Phoebe: Yes, Denise. Denise.
Joey: What is with the secrecy, Phoebe? And what about this Denise? Is she cute?
Chandler: Pheebs, I don't understand. How can you have a roommate that none of us know about?
Phoebe: Maybe because you never listen to anything that I say. I talk about her all the time. Denise!