Who is Better Lier ??? Excellent One

One day rohans's dad bought a robot. The robot was vary special
it could detect a lie & would slap the person who lied on the face.

One day rohan returned late from school that day and his dad asked him,
"Son why are you late from school?".

Rohan replied , "Dad we had extra classes todayso i got late". The
Robot jumped up and slapped Rohan 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? " Mummy ",

Rohan got a tight slap on the face from the robot.

"No dad honest I went for the adult movie."

Dad : "Shame on you son when I was your age I never used to do such
shameful things." The dad gets a tight slap on the face from the robot.

Hearing all this, Rohan's mother comes walking out of the kitchen saying,
"After all he is your son.......", to which the robot steps up and
gives a resounding slap on Rohans's mother's face !