Little Johnny is walking by his parent's bedroom when he hears a lot of noise. He opens the door and sees his dad with his mom bent over the dresser having sex. Dad looks at Little Johnny and smiles, gives him a wink and motions for Johnny to leave the room, so he does.

A few minutes later dad is walking past Little Johnny's bedroom and hears a noise. He opens the door to see Little Johnny with grandma bent over the dresser having sex. Little Johnny looks at dad and smiles, winks at him and says, "It's not so funny when it's YOUR momma, is it?"