Three men are sat in a bar discussing God and his profession.

"God must be a mechanical engineer,” says the first. “Just look at the joints in the human body."

“No,” say’s the second man. “God must be an electrical engineer -- just look at the nervous system."

“You’re both wrong,” says the third man. "God has to be a civil engineer.”

“Why’s that?” ask the other two men.

“Well who else would run a waste disposal pipeline through a perfectly good recreational area?"