La politesse, c'est élémentaire

At the supermarket, Lucas does not hold the door to his father, does not apologize when he throws a cereal package at the head of Célestin, is not ashamed to call his father as if he were in the yard from a school, until dad asks him: would he have forgotten the elementary rules of politeness? No, of course, and the cashier will even see him as a well-behaved little boy.