In societies of economic need, sexual attractiveness has a lot to do with wealth. In such societies, every capable person, man or woman, has a realistic, theoretical chance to improve their sexual attractiveness by becoming richer. This chance is tied to the passage of time. This is why, in societies of economic need, there is negligible ageism.
But in societies of affluence, sexual ageism is a major dilemma because sexual market value is tied to physical attractiveness, and youthful looks are a major component of it. This means that everybody, women and men alike, experiences a decline in sexual market value as they get older.
Unfortunately, for women, this decline is often perceived to set in much earlier than for men, around the age of 20, and the decline curve is steeper. Depending on the fabric of a society and cultural perceptions, the onset of a steep decline in physical attractiveness for men can be delayed by ten to twenty years. But it sets in nevertheless.
Cosmetic surgery and related procedures can artificially delay this decline in attractiveness. This is why cosmetic surgery is not merely a matter of personal vanity. It has a significant social dimension and a far greater ideological impact on the world than, for example, kidney transplants.