The Age of Why?

Conversation overheard one night:

Hollis: Daddy, why is it dark?
T: Because the sun went down.

Hollis: Why?
T: Because the earth rotates on its axis and we're facing away from the sun right now.

Hollis: Why?
T: Because of the gravitational pull of the sun.

Hollis: Why?
T: Because ... um... it just is.

Hollis: But why?
T: The sun went to sleep.
Hollis: Oh.

Hollis: Daddy?
T: Yes, Hollis?
Hollis: Does the sun have his pacifiers?
T: I'm sure he does, buddy.

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This is Day 6 of Wil Wheaton watch. He's guest starring on NUMB3RS tonight, so I've set my TIVO for some prime time stalking.