Quote from Phoebe in The One Where Chandler Can't Remember Which Sister
Ross: Somebody's at the door on the ceiling. Rachel: That's our unbelievably loud upstairs neighbor. Monica: Yeah, he took up the carpets, and now you can hear everything. Phoebe: Why don't you go ask him to just, "Step lightly, please?" Monica: I have, like five times. But the guy is so charming that I go up there to yell, then I end up apologizing to him. Phoebe: Oh, that is silly. I'll go up there. I'll tell him to keep it down.