Who's Your Daddy?

I have to set up this story in order for it to make sense: On occasion, we have pizza delivered to our house. This is a very exciting thing for Matthew; some stranger is coming to our house and providing food. So last night, we ordered pizza. And, as always, Matthew was very excited when the pizza man showed up with the food. He talked all night about the pizza man.

This morning, we had a salesman come to the door, and Matthew wanted to know where the pizza was.

Later on, this conversation took place:

Chris: (to Matthew) Come here, son.

Matthew: I not your son.

Chris: Really?

Matthew: No.

Chris: So, whose son are you?

Matthew: Um, pizza man.

Chris: Well, that answers a lot of questions.