One day, Little Johnny comes home from kindergarten for lunch.
Not finding his mother in the kitchen, or the living room, he heads upstairs to check her bedroom.
He opens the door, and what does he see, but his father, who had also come home for lunch, sipped naked, on top of his mother, also naked, heavily into the act of lovemaking.
Not wanting to traumatize the boy, the parents continue as if nothing was wrong.
Johnny watches, and after a couple of minutes asks,
“Daddy, can I climb on and have a horsy ride?”