The link between smacking and sexuality is too strong in history, in biography, in fact, for anyone to feel in any way comfortable about the practice of beating adolescent boys. Given the general randiness of puberty the chances of the beating occurring during a state of sexual arousal are probably quite high. Once the link is forged it may be generalized till biting, beating up and other inflictions become habitual in sexual activity. Time and time again in case histories of psychopathology of a sado-masochistic kind one finds explicit origins in adolescent punishments. Hitting, slapping, or spanking children as punishment shows them that it's okay to hit others to solve problems and can train them to punish others in the same way they were punished.
Physical punishments stop unwanted behavior only for a short time.
Even with very harsh punishment, children may adapt so that it has little or no effect. Using even more punishment is equally ineffective. The paddling of a child to the point of being bruised and fearful of returning to school illustrates the lack of control that states have over their schools' disciplinary practices. Americans are striving to teach children not to use violence to solve problems, not to bully others, and to respect themselves and other people. I don't see how children can learn these lessons when the very people who give them guidance their teachers and principals are leaving them bruised and battered.