Title: Why Men Lose Their Sex Drive after Marriage
When the public competition with other males for the Breeding position with a particular female in societies social order
is over, because the Female has already selected,
and when the social significance of marriage that attaches to marriage in our society has been attained,
and which status he cannot attain from society by any other manner,
Many men (who had to elevate their sex drives during that competitive period so they could compete,)
no longer have any competitive need to elevate their sex drives to those levels anymore,
and their sex drive drops to normal levels.
This is from an idea relayed to me by Mallory Miller based on a book he thinks written by Dr. Donald Joy,
and perhaps named Tournament Males v Integrated Males.