Niles: Daphne, wait, wait, wait, wait, there's something on the back of your dress.
(Niles directs us to a white spot on the backside of her dress)
Daphne: (looks round) Oh my God, it looks like bleach or something!The dry cleaner must have done it!
Roz: I saw it, it's nothing.
Daphne: You saw it?!
Roz: Don't worry, it's hardly noticeable.
Daphne: (distraught) Dr. Crane noticed it!
Roz: That's because he's always looking at your...
Niles: (quickly) Roz!