Boys are sometimes more stubborn than girls; and if you give them a little punishment in the form of gymnastics it corrects them. If a boy is told to sit down and stand up fifty times, it helps him in his gymnastics, and at the same time he feels punished. Boys are difficult to control, and can easily become insolent if they are not trained from their babyhood. A girl by nature is thoughtful, and a boy by nature is the contrary. When a boy is thoughtful it means that life has taught him.