I pointed out, you refused to look at what was pointed at.
There is a reason that you find the link on "Orthodoxy Today" and not on "Science Today", or another credible source, it is because the study does not meet peer review.
And lastly, I do not believe that promiscuity among a group of unmarried men is a measure of "unstable" it simply is what guys do when they are cannot marry, are rejected by society and religion, and like other guys rather than women who are sometimes more careful about partners.
I don't believe that having sex makes them "unstable" in a way that would effect their performance as soldiers. Can they shoot straight? Do they perform well at the needed tasks? In almost every case decorated men and women who have performed admirably are the ones we lose.