A man buys a robot with a built-in lie detector which slaps people when they lie.
When it arrives at his door, he un-packs it, preps it per the instructions and decides to test it out at the dinner table.
He asks his son: where were you during school hours today?
His son replies: at school.
The robot slaps his son.
OK, I was at the movies!
His father, now very interested and intrigued by his new "toy", asks: which one?
His son replies: Toy Story.
Smack, goes the robot again.
OK, OK, it was called a Day with a Porn Star.
Dad says: WHAT??? When I was your age, I didn't even know what porn was.
The robot slaps Dad.
Meanwhile, Mom is getting into these new devopments and blurts out: HA-HA!!! After all, he is your son!
The robot slaps Mom.