This result suggests that there might be differential socialization for males and females (allowing more high aggression in males and dampening the expression of aggression in females), resulting in the different trajectories of retention of patterns of high aggression.47 This is especially interesting given that there does not seem to be a link between physical aggression and the testosterone spike in males at puberty, which might have been an explanation for the maintenance of increased high aggression into adulthood by males.