A father buys a lie detector robot that slaps people when they lie.
He decides to test it out at dinner one night.
The father asks. What did you do today?
The son says, "I did some homework."
The robot slaps the son.
The son says, "OK, OK. I was at me mate's house watching a film."
Dad asks, "What film did you watch?"
Son says, "Toy Story."
The robot slaps the son.
Son says, "OK, sorry dad, we were watching porn."
Dad says, "What? When I was your age, I didn't even know what porn was."
The robot slaps the father.
Mum laughs and says, "Well, he's certainly your son."
The robot slaps the mother.
Robot for sale.