Quote from Monica in The One with Joey's Porsche
Joey: I figured if people keep seeing me just standing there, they're gonna start to think I don't own it. So I figure I'll wash it, right? Monica, you got a bucket and some soap I can borrow? Monica: Oh, yeah. I got soap and sponges and rags and carnauba wax and polishing compound. Chandler: You don't even have a car. Monica: I know. But one time there was this really dirty car parked in front of the building, so I washed it. Chandler: And? Monica: And six others. Chandler: There you are.