Johnny is walking along and a priest is coming the other way. Johnny says, 
"Hey, mister, why are you wearing your collar backwards?"
The priest says, "Because I'm a father."
Johnny says, "Yeah? Well, my old man's got three kids and he don't wear 
his collar backwards."
The priest says "You don't understand, son. I have thousands of children." 
Johnny says, "You should wear your fuckin' trousers backwards."