(My dad has decided he is going to invent a board game, so there are papers with ideas lying around the place. Mum has decided to clean up.)

Dad: “Don’t throw those out; that’s the game I’ve invented.”

Mum: “You invented a game, really?”

Dad: “Yes. As soon as I get it completely done, I’m going to sell it to a game company and make a fortune.” *he then describes the game in detail to Mum*

(A few days later Mum goes shopping and brings home a game. She puts it in front of Dad.)

Mum:  “There you go; there’s your game.”

Dad: “What? Someone stole my idea; I’ve been working on that for months!”

Mum: “It’s been out for years. I thought it sounded familiar when you described it to me.”

(For the record, the game was “The Game of Life.”)