Discipline & punishment
Males are hierarchical by nature. There are Alphas and betas; men and boys; fathers and sons. A cornerstone of enforcing order among men and boys is structure, discipline, and punishment.
Straight Guy Spanking
Boys respond to corporal punishment. It's part of the male psyche - the need to submit to the Alpha male. Spankings are humbling, humiliating, and incredibly painful. And they work wonders for changing behavior.