Boy #1 arrives at school with a new watch. Boy #2 asks if it's his birthday. Boy #1 explains: "I woke up the other night and was thirsty, so I went to my parents room to wake them. When I got there I saw Dad on top of Mum, bouncing up and down. They told me to go back to bed and in a minute, Dad came to my room and said I mustn't tell anyone what I'd seen. He said if I promised not to say anything, he'd buy me a new watch." Boy #2 thinks about this and decides he wants a new watch as well. So that night he waits for his parents to go to bed and after a while he walks into their room and finds his own dad on top of his mum, bouncing up and down. Dad spots him and says,"What do you want?" Boy #2 says,"I want a watch." Dad says,"Well, close the f*cking door and sit down, then."