Why is it that sneaking a nap is so much better? Is it because it is like cheating? Getting something for nothing? It doesn't count?

The past few holidays I could be found sitting in my recliner with the stereo cranked. Was I power napping?

Somehow it's better than putting on P.J.'s and lying down.

Why when we were kids did we resist the nap so much, and now that we are older crave it so often?