I found this joke submitted to the Normal Bob Smith site (link down on the right) by one of his fans. Not to everyone's taste, but I laughed.
Four Nuns die in a car accident and are waiting to get into heaven through the pearly gates.
St Peter, being the gatekeeper, asks if any of them have had anything to do with a man’s penis.
“Yes,” says the first, “I've seen one.”
“Go wash out thine eyes in the holy fountain and yea may enter the gates of heaven.”
“Well, I've touched one,” says the second nun.
“Go wash thine hands in the holy fountain and yea may enter the gates of heaven.”
St Peter now turns to see the last two nuns beating the shit out of each other, so runs over to separate them and demands to know what’s going on.
“Well,” says the third nun, “I want to gargle before she washes out her arse.”