Sir chirp a lot got the car finished did he?
Here's another.
Young William came home for lunch from kindergarten. Not finding his mother in the kitchen, or the living room, he headed upstairs to check the bedroom. He opened the door and there was his father, who had also come home unexpectedly for lunch, stripped naked on top of his mother who was also in her birthday suit. They were both heavily into the act of lovemaking. His father noticed young William standing in the doorway and not wanting to traumatize the boy, continued humping as if nothing was wrong.
William watched a while, and after a couple of minutes asked, "Daddy, can I climb on and have a horsie ride, too?"
Somewhat startled by this request, but without breaking stroke, his father answered, "Of course, son, climb on my back."
William swung himself 'into the saddle' and added that little extra weight to his daddy's energetic thrusting needed. As a result, it took only a few more moments and his mother started bucking and moaning - thrashing and writhing wildly.
"Golly Daddy, hang on really tight!" cried young William, "this is where me and Uncle Freddy fall off most of the time!"