Benny gets to watch his parents doing Sex

Little Johnny comes in to school one morning wearing a brand new watch. His best friend, little Benny, wants to know where the watch is from, so Johnny tells his story: 

“I was coming from the bathroom to my bedroom when I heard a strange noise from my parent’s bedroom. I walked in and saw them bouncing up and down. Dad said I could have anything I wanted as long as I didn't tell the family. I asked for a new watch and here it is.”

Benny decides he wants one too, so night after night he listens outside his parents’ bedroom for any strange noises and, sure enough, eventually he hears some banging and groaning from the other side of the door. He walks in and catches his parents in the act, so his dad offers him anything he wants to
keep quiet about the whole affair. 

Benny immediately says, “I want a watch.”

The dad sighs and says, “Alright, but go and stand in the corner and don’t make any noise.”