Little Johnny walks in on his parents having sex and asks, “What are you doing?”
His father says, “We’re playing cards, and your mother is my wild card. “
A week later, Little Johnny walks in on his father masturbating.
He asks, “What are you doing?”
His father says, “I’m playing cards. “
“Where’s your wild card?” Johnny asks.
His father replies, “Son, you don’t need one when you’ve got a good hand. “
This joke is included in the Black Book of Jokes. You can order it from here.