God decided one day he needed a vacation, but He can't decide where to go. He goes to St. Peter and asks for advice. St. Peter says "What about Mars?" "Nah," says God, "I was there about 25,000 years ago and it was so hot that I got the worst sunburn ever."
St. Peter thinks for a bit and then says, "What about Pluto?" God says, "No, last time I was there I spent way too much money at the blackjack tables there." St. Peter thinks again and says, "Well, what about Earth?" God looks at him and says, "Are you kidding me? I went there about 2,000 years ago, knocked up some Jewish chick, and I haven't heard the end of it since".