Jill: I bet you can’t lose even a kilo off this belly of yours.
Jack: Oh, really?
Jill: Yes, REALLY.
Jack: What if I can?
Jill: You cannot. You just can NOT.
Jack: Ok I hear you. But what if I do?
Jill: Well, in that case, you’ll get anything you ask of me.
Jack: Ok. One Extra Cheese Large Margherita Pizza.