Because he's four and one curious little guy... the most-asked question in my son's universe is "why?" He and I often twirl into circular logic when the questions get silly or I bring out the heavy poultry artillery -- chickens.
Why did you change the lightbulbs?
Because these are fluorescent and last longer but use less power.
Why do they use less power?
Because it's a different technology.
Why is it different?
Because the chicken crossed the road.
Why did the chicken cross the road?
To get to the other side.
Why are you laughing?