I turn off the lights as we leave the house:
S: Aren't you afraid of the dark, Daddy?
Me: No, I'm not afraid of the dark. Why would I be afraid of the dark?
S: I'm not afraid of the dark either.
Me: That's good.
S: I'm not afraid of anything!
Me: Haha! Then what was all that screaming about yesterday with the fuzzy in the bathtub that you thought was a bug?
S: Spiders are scary!...