Quote from Chandler in The One Where Everybody Finds Out
Chandler: Okay, did you see that? With the inappropriate, and the pinching? Monica: Actually, I did. Chandler: So now do you believe that she's attracted to me? Monica: Oh, my God. Oh, my God. She knows about us. Chandler: Are you serious? Monica: Phoebe knows, and she's just trying to freak us out. That's the only explanation for it. Chandler: Okay, but what about, you know, my pinchable butt and my bulging biceps? [Chandler feels his arm] She knows!