An age gap relationship featuring an older male and a younger female makes perfect sense from an evolutionary perspective. Males seek young healthy females most likely to be able to produce healthy offspring. Females seek status and resources in a partner so as to be able to provide for those offspring and for her while she is caring for them. Each gets what they most want. The idea that the couple should be of roughly the same age is a culturally Western view and s fairly recent one at that.
Oddly enough it is actually a Jewish thing. The Talmud teaches that when looking for a husband for your daughter you should seek one that is closer to her age then yours. It was considered a shame to marry a young girl off to an old man.
it would only make some sense if this was the guys first relationship....I can see the stock piling of financial assets to support a young family....
but if the old guys go for the young ones, whats left for the young guys?...they are at their prime sexually and physically and what do you expect them to to while fat bald grandpa dates young women....twiddle his fingers?
there is a reason why men naturally loose their ability to perform, etc.....its natures way of saying "enough"....its natures way of saying we need new genes from the young and healthy guys...