A lot of lifes problems in this area could be avoided by recognizing a few very simple truths: women sell sex, and men are the buyers. There isnt anything inherently wrong with that, as long as the price is high enough: true love, marriage, a lifetime of commitment.Problems arise when its sold cheaply, or given away. The woman is perceived as stupid, or a slut; the man is seen as a genius.
The man would be less of a genius if he had no access or claim to children of marriageless sex or of adultery. Both men and women would be seen as stupid sluts.
Not all men are inherently without conscience or consideration, and I see it as unfair to paint with the broad brush that you do.