Why is the angel at the top of the Christmas tree?

[potatoburn]

Well, Santa had been slaving over preparations for Christmas. He had lists to write, toys to make, reindeer to feed, stables to clean, AND he had to polish Rudolph's nose. He was exhausted. He just wanted one moment, just ONE moment, of rest, but the angel came up to him, dragging along the Christmas tree. The angel asked Santa where he should put the Christmas tree. And Santa told him.

Get it?

"Right up your ass."

xDDDD