Favorite Porn Line of ALL time

A man is going down on a woman, in the 70s porn movie "Deep Throat" (incidentally, the highest grossing movie of all time...not highest grossing porn movie, but highest grossing ANY movie; that means it's sold more tickets than ET, Star Wars, Titanic, Lion King and Indiana Jones). The camera pans up to her and we see she's trying to light a cigarette. She stops suddenly, looks down at the man and taps him on the head. He looks up at her. She takes the unlit cigarette out of her mouth and says to him:

"You don't mind if I smoke while you eat, do you?"