When I was 30 or so, my friends all had interesting and attractive wives and my wife had interesting and attractive friends.
Now that I'm over 50, my friends' wives are no longer interesting and attractive and my wife's friends are no longer interesting and attractive.
I'm not an age-a-phobe. I find a lot of older women to be quite beautiful as people and in appearance. Just not my wife's friends or my friends' wives.
Lots of people (men and women) tend to develop ugly qualities as they get older. They eat too much of the wrong foods, they don't exercise and they don't care. They wear clothes that are comfortable instead of stylish so they look like an unmade bed. (Often and unmade kings size bed). As youthful hopefulness gives way to boring routines, they become louder and more negative. Oftentimes even critical of innocuous things in their periphery that shouldn't even bother them. You can see the "get off my lawn" attitude developing.
The more I see those qualities in my peers, the more I want to fight them. Maybe it's vanity. Maybe I don't want to grow old.
I like to believe it's actually because I want to be a friendly likable person when I get old instead of the kind of person kids and grandkids hate to visit and neighborhood kids love to egg.