Loss of sex appeal by women
Negative self-image of elderly women
Among the early Franks in the Middle Ages, the fine for murdering a fertile women was three times that for murdering a man, but after menopause her value became negligible.
Women are enjoined to disguise their age and then ridiculed for doing so. Middle aged men are considered to be at their peak whereas their female peers are constrained to imitate their younger sisters.
Surely men are not such superficial creatures as to be blind to the qualities of women their own age.