Men and women dream differently. Women tend to recall their dreams more often than men and women tend to report more frequent and more intense nightmares than men. Men dream more often about other men rather than women, whereas women dream equally often about men and women. For example 67% of characters in men's dreams are other men whereas 48% of characters in women's dreams are other women. Men tend to dream about aggressive encounters with other men (typically strangers) while women tend to dream about interactions with familiar others that take place in familiar surroundings.
Why do these consistent sex differences occur in dreams? One possibility is that men and women are socialized differently as they grow up-boys are taught to be more aggressive than girls, and girls are taught to be more social than boys -or so the story goes.
But there is plenty of evidence to suggest that boys do not need to be taught to be aggressive and girls do not need to be taught to be social. The biologies of boys and girls propel boys and girls down these sort of developmental trajectories. While the trajectories are not inevitable and deterministic, they are real tendencies.
Thus, the dream recall and dream content patterns of men and women differ because the biologies of men and women differ. Why would Mother Nature tend to increase physical aggression levels in boys and verbal social interactions tendencies in girls... to put it in crudely simplistic terms?