lie detector robot

[Craig]

A man buys a lie detector robot that slaps people who lie. So he decides to try it out at dinner.

DAD: Son, where were you today during school?

SON: At school *robot slaps son*

SON: Ok, I went to the movies.

DAD: Which one?

SON: Toy Story *robot slaps son again*

SON: Ok, it was A Day with a Porn Star.

DAD: WHAT?! When I was your age, I didn't even know what porn was. *Robot slaps dad*

MUM: HAHA!! After all he is your son, *Robot slaps mum