Check the joke below:

One day little Johnny asks his father: “Dad, why do grown-ups like to exercise in bed?”

Wife was cooking dinner when she heard little Johnny ask, so she eavesdrops and listens to what her husband will have to say.

Father: “Because it makes grown ups happy”

Johnny: “I want to be happy too!”

Father: “Then you have to wait until you’re a grown up!”

Johnny: “But who will exercise with me when I grow up?”

Father: “Hopefully when you get married, it will be your wife!”

Johnny: “But dad, how come our neighbour Sally exercises with you?”

Wife rushes out of the kitchen, ambulance arrives 10 minutes later.