Ask a complex question and I'll give you a complex answer.
Hint: ever wonder why there's a massive beauty industry for women but almost no beauty industry for men?
Hint: ever hear women say
there's no such thing as an ugly millionaire?
Answer: males and females of our species do not use the same criteria to objectify each other in the mate selection process.
Females objectify and select males based on their social status. Males objectify and select females based on their looks. This is instinctual behavior in our species. Like all instincts it's driven by an adaptive advantage. That adaptive advantage is reproductive success.
Reproductive success for a human female isn't becoming a mother it's becoming a grandmother. This requires twenty to thirty years of resources. High social status (wealthy) males are best at providing it and are the most attractive to females. The ultimate expression of this instinct is the groupie phenomenon where dozens, hundreds, thousands of women have sex with wealthy superstar males.
Want more proof that reproductive success is becoming grandmothers? Menopause. Until recently we were the only species we knew where females stop ovulating yet live on for years even decades. The adaptive advantage of this is, again, reproductive success. Having raised their own children grandmothers now help raise grandkids maybe even great grandkids. Our remit as a species is to send our DNA into the future. The instinctual drive behind this is massive. We are 8 billion now.
(BTW in the last 10-15 years we've discovered females of several species of toothed whales also menopause and live on for years helping to creche, raise & train the young. Orca females were the first. Beluga, narwal and at least two species of pilot whales have recently been added to the list. No surprise given their highly social nature.)
Now. Males. Reproductive success for a human male is becoming a father--not necessarily a grandfather since males are traditionally more expendable in dangerous occupations including hunting, soldiering, mining, forestry, transportation, construction and other heavy labor.
Human males are instinctually most attracted to female reproductive success. For human females that's a ten year period ending at age 26 and peaking at age 21-22. Data shows this is true for at least six different metrics: lowest miscarriage rate, lowest stillbirth rate, lowest infant mortality rate, lowest birth defect rate, lowest maternal death rate in pregnancy & delivery and, six, lowest rate of other diseases of pregnancy--and all of these without the intervention of modern medicine (obstetrics) which is a recent invention. This data continues to be reaffirmed because millions of women in the world still have little or no access to obstetric medicine during their pregnancies. Sadly.
In short, human males are most attracted to younger women because they are the most successful reproducers. What does the beauty industry do to females of our species? It makes them look young. Smooth skin, high breasts, high butts, flat stomachs, no gray hair? Young women near their reproductive peak have these. Older women do not and may rely increasingly on the beauty/cosmetic industry to maintain a youthful look to remain attractive to men. Women older than 26 can certainly have children but the risk increases with age. Pregnancy at 35+ is considered high risk even with modern medicine.
tl;dr - We are instinctual animals. Our remit is to reproduce. Evolution/adaptation has shaped our behaviors over hundreds of thousands of years. Females of our species objectify males on their social status (wealth) not their looks. Males of our species objectify females on their youthful looks not their social status. Females who have a youthful looks will show it off to attract the best males (of high social status). Males who have high social status will show it off to attract the best females (of youthful looks). Females compete with all other females for the best males. Males compete with all other males for the best females. Even same-sex attracted humans have instinctual attraction to wealth and good looks.
Can you tell I'm a biologist?