Men tend to be the aggressors is why.
Now if women were to be far more forward there would be far more polygamous relationships.
This is actually shown with the current day Brazilian tribe called the Zo'é.
Look it them up soon, because while they have existed for hundreds of years, they are being slowly converted to Christianity.
First of a five part series.
[media=https://m.youtube.com/watch?v=odcxb4hfRDM]