It’s for his own good
gets off on exploiting his authority, chemistry teacher Bill Powderly of Marshall, Minnesota explained to The Onion.
“Claiming that his gruff classroom demeanor was often misunderstood,” Powderly said bullying adolescents is a thrill. “You don’t have to like me, but I conduct myself in this manner because [it makes me feel like an omnipotent god-king].”