Why?

BEN: Mom, why is there a white tower over there.
Me: I don't know Ben, where?
BEN: Over therrrrrrrrrrrrrrrreee!
Me: I don't know Ben i can't see it (I am pretty sure we passed it driving,and i missed it.
BEN: Why don't you know?
Me: Sometimes I just don't know the answers to all of your questions, Ben.
BEN: Why?
Me: Well........Ben, I just don't know everything i guess.
BEN: Daddy knows every thing, Mom.
Me: (Laughing) Yes, Ben, Daddy knows everything.
BEN: Mom, it's not funny.
Me: I know Ben...it's not funny.