Sheldon Flender: You, you, you're all missing the point, the point is I can give pleasure many times a day!
Rita: Oh, now, really Flender, what does quantity got to do with it?
Sheldon Flender: Quantity, quantity affects quality!
David Shayne: Says who?
Sheldon Flender: Karl Marx!
Rita: Oh, so now we're talking economics.
Sheldon Flender: Sex is economics!