"How about Mercury" says St. Peter.
"No, I went there 25,000 years ago and got a real bad sunburn" says God.
"OK, how about Pluto?"
"Nah, I went there 10,000 years ago and broke my leg skiing."
"Ah, how about Earth?"
"No way! I went there 2,000 years ago and knocked up some Jewish chick, and I'm still catching shit for it!"