One day an insurance salesman knocked on a door. Little Johnny answered the door. The insurance man asked if his mother was home.
“Naw. She’s at the whore house.”
The salesman asked, “She a prostitute?”
“Naw. She’s a substitute. She only works Wednesdays and Fridays during the rush.”
The salesman shook his head and said, “Well, I’ll be a son of a bitch.”
Little Johnny said, “Yeah, well, I’m one, too, but I don’t go around knocking on doors telling folks.”