Glad you asked. 25 years ago most of the good scientific data about the differences in how males and females reached adult maturity and responded to the rigors of separation differently was being analyzed.
There are numerous books that set forth attempts to explain the behaviors and end results of those experiences.
Because most of the political and academic fixation on the myth of making two unequal things equal our society has stagnated in improving and looking for solutions. (other than advocating the destruction of masculinity altogether, with terribly horrific results)
So I'll give you one clue that I know about and you'll need to do some reading if you really want to know.
Moms tend to hold their infant sons more often in the first 6 months of life, but they also tend to have far less physical contact after that compared to their daughters from 6 months through the balance of their lives.
Females for the past several millenia have been indoctrinated more accentuated in and by the families and parents with socialization behavior.
Whilst males have been indoctrinated with their parents relatives and society in general with autononymity behaviors.
It's not due to constructs of social systems. It's hardwired into the human genome itself. And no fiat of law or modification of social mores can alter it.
Yet books like 'Separation Anxiety and the Dread of Abandonment in Adult Males' and many others never got properly studied, refined or responded to back in 1994. Academia simply cherry picked whatever supported their belief that men and women could, and needed homogeniety.
A bit of reading can clear much of this up for anyone who's truly interested in knowing the facts.
