At what age does a woman lose her power over men? younger women/older men?

so most men like women of all ages. when i say older men i mean 40+. most of these older men are married to women their own age and yeah im sure they love their wives and everything but they're not fascinated / obsessed / hypnotized by them? lol i cant think of the right words. you'll know what i mean if you'e ever been with an older man. its not a normal relationship with fights and arguments.. the older man does everything to make the younger woman happy. its like he's under a spell? the younger woman has a lot of power over him, im taking a history cl and we were talking about king henry VII.. his wife kathryn was 19 and he was 49 when they got married.. he described her as a "rose without a thorn" and "the ultimate jewel of womanhood" he bought her gifts, dresses and jewellery.. none of his other wives got that kind of special treatment. so what is it about younger women? obviously beauty but there are attractive older women too and they don't get that kind of attention from older men.. at what age does it stop?