He sees you when you're sleeping
He knows when you're awake
He knows if you've been bad or good
So be good for goodness' sake!
Spot the logical flaw in those lyrics? If you're being good because Santa will know if you're not, then you're not being good just for the sake of goodness, now are you?
Okay, so I could never write anything that catchy. I can still critique it!
Here's Calvin's take on it all.