Big Bang Theory Quote
Penny: Hi, you guys ready to order?
Sheldon: (the gang mutters consent) Sure.
Penny: 'Kay. Priya?
Priya: I'll have the Shepherd's pie.
(to Leonard)
Priya: You want to split that with me?
Penny: Oh, no, no, no, he doesn't.
Priya: Why not?
Penny: Well, you know, milk in the taters, milk in the gravy, parmesan crust... your lactose-intolerant boyfriend will turn into a gas-filled Macy's day balloon.
Sheldon: Not quite accurate. Macy's balloons are filled with helium, whereas Leonard produces copious amounts of methane.
Quote from S04E24 - The Roommate Transmogrification