I don't have an answer based on any kind of scientific information, but I have a theory about this. I think that young boys who are learning how to behave towar

I don't have an answer based on any kind of scientific information, but I have a theory about this. I think that young boys who are learning how to behave towards women test their boundaries. Since they are anonymous, they go way too far into aggression. So I think the combination of being at the bottom of the food chain in terms of being a mate combines with their anonymity and their lack of actual social skills in behaving towards women.