Season 6, Episode 5: "The Couch"

...to choose any topping they want.

Now, on this issue, there can be no debate.

What gives you the right to tell me how I make my pie?

Because it's a pizza.

It's not a pizza till it comes out of the oven.

It's a pizza the moment you put your fists in the dough.

-No, it isn't! -Yes, it is!