Men will rationalise, say they have lovely skin, make them feel younger, less likely to have STDs, but I prefer the idea that we still carry the basic urges of our ancestors long ago, when it was necessary for the human race to breed in order to survive. The older women would be less likely to survive child-birth, so men might still be "programmed" to seek younger women. Another factor is out-breeding - spreading DNA to strengthen the species - many animals do this. The young women would see the older man as more competent, wiser and more stable, a better husband. Your brain can dominate your sexual urges or suppress them perhaps. I adore my wife (she's 55, still a fine lover) and can appreciate young girls who are beautiful or sexy, but I don't fancy them in the slightest. A friend of mine spends half his life sniffing out young girls who are willing. Chacun a son gout.