Sociopaths exhibit poor impulse control. They also get bored easily. One possible explanation to Dodd s behavior might be due to a bad fall. As a child, he fell off a fence and knocked himself unconscious. Although many children take hard falls, sometimes a blow to the head can cause brain injury, which can be a factor in antisocial behavior.
Inhibitions are less controllable.
Recent studies indicate that sociopaths have a dulled sense of stimulation, including a higher pain threshold. They will sometimes engage in risky and often hurtful behavior to increase stimulation. He also stuck a stick up his anus and rode his bike, naked, letting the stick get rattled by the rear-end tire. The stick was bloody by the time he was done, but it didn t seem to hurt him much. Like many sociopaths, Dodd masqueraded as a nice guy.