Dont Tell lies

One day Mr John bought a robot.
The robot had a specialty. It could detect a lie and would slap the lier on the face. Mr John's Son returned late from school that day so he asked him, " Son why are you late from school?". Son answered, "Dad we had extra classes today". Much to his astonishment the Robot jumped up and slapped the boy on his face. His dad told him" Son, this robot is special in that he can detect a lie and will then slap the person who lied now come on tell me the truth, " Why are you late?" "Dad I went for a movie", " Which movie?" "The Ten Commandments", 'Splat' again he got a tight slap on the face from the robot. " No dad honest I went for the movie Sex Queen." Shame on you son when I was your age I never used to do such shameful things." 'Splat', the dad gets a tight slap on the face from the robot. Hearing all this, the mother comes walking out of the kitchen saying, "After all he is your son, he will be like you", to which the robot steps up and gives a resounding slap on the mothers face!!!!!