More to the science of it.

Girls and Boys under the age of 10-12(approx) are the same hormonally.
When hormones kick in little boys and girls become the OPPOSITE of each other.
Boys do more high testosterone type activities than girls.

Through most of our adult lives this remains true.

At midlife and above the change in hormones occurs.
At the end of our lives adult men and women again revert to what we were like in our childhood(hormonally).

This creates a change in lots of other things so we become the OPPOSITE of who we were and what we did.

In mid-life the change/rate of change of these hormones help to create this confusion.

So maybe that explains better what I am am trying to express.
Again this is a very shortened version of what is going on.