Without this instinctive need men would never marry to begin with. Sexual propagation doesn't require a long term commitment. Women on the other hand, with a few million years of evolution haven't needed the love of a man so much as his presence. He provided protection for the wife and especially for the children from the murderous genetic competition of other males, as well as assisting in obtaining food for the family. Now with modern society and its civil protection of individuals, men are becoming less and less necessary for the survival of the species.
Female spiders devour their mates after fertilization.
This doesn't bode well for us males. In a macho society men don't admit a need for love and affection and believe it sufficient to find sexual pleasure. Yet, it has been said that half the men that visit prostitutes are content with talking and caressing short of orgasm. Women, on the other hand, in a poor country like Honduras know full well the economic benefits of an older man with a secure income as compared to a young man with a macho complex and no intention of sharing his meager income with a family. The biological facts argue so strongly in favor of liasons between older men and young women that any efforts to dissuade them is likely to have the opposite effect.