There is nothing abnormal about finding sexually mature females attractive. That's hard-wired into male dna. Aging women are likely not fertile and that's why a 50 year old man would still bang a 20 year old girl over someone his own age, if he can. What men are attracted to is simply the visual stimulus suggesting a woman would produce viable offspring. If women were most fertile at 50 old men would not be attracted to younger women, that's how biology works. The irony is while nature makes us attracted to women who will likely produce offspring, most of the sex in this country is recreational and children are not a desired outcome