Lie detector robot!!!



A father buys a lie detector robot that slapped people when they lied. 
He decides to test it out at dinner one night. 
The father asks his son what he did that afternoon. 
The son says, "I did some school work." The robot slaps the son. 
The son says, "Ok, Ok. I was at a friend's house watching movies." 
Dad asks, "What movie did you watch?" Son says, "Toy Story." The robot slaps the son. 
Son says, "Ok, Ok, we were watching "dirty stuff"." 
Dad says,"What? At your age I didn't even know what "dirty stuff" was." The robot slaps the father. 
Mom laughs and says,"after all, he is your son." 
The robot slaps the mother. 
Robot is now for sale.