Johnny Playing Cards Without A Partner

Little Johnny woke up in the middle of the night and went to the  bathroom.
On the way back to bed, he passed his parents' room. When he looked in, he
noticed the covers bouncing. He called to his dad, "Hey Dad, what are you
doing?"

The dad answered, "Playing cards."

Little Johnny asked, "Who's your Partner?"

The dad answered, "Your mom."

A little later, the dad got up and went to the bathroom (naturally). As he
passed Little Johnny's room, he noticed the covers bouncing. He called to his
son, "What are you doing?"

Little Johnny answered, "Playing cards."

The dad asked, "Really? Who's your partner?"

Little Johnny answered... "You don't need a partner if you have a good hand!"