What's the Difference?

A very old, but respected man walked into a local tavern. He looked around at the decor and realized it was the holiday season. He saw his neighbor, drunk out of his mind. The old man stepped up to the neighbor and asked him a question, "Jack do you know what difference between the baby Jesus and your wife?"
"No," replied the dead drunk man.

"Well the baby Jesus slept with a jackass one night, your wife sleeps with one every night."