That is because when you are in your early 20s you are in your physical peak. It is hard not to be hot, even if you are just average. When you age that changes pretty quick though, especially for women, who tend to be less active than men overall. There might still be some people who are hot 40, 50 or more, but they really have to work at it. The vast majority of people don't do that, so their physical appearance fades.Some guys are just stuck.
When they are in their 20's, they are attracted to hot 20 year old women. Then in their thirties, they are still attracted to hot 20 year old women. Forties, fifties, nothing changes - their attraction is still to the 20 something hotties.
Thank God for the free enterprise system. Where there's a demand, there's a supply.
Now, if you are paying someone a lot of money specifically to be physically attractive, you are much more likely to find that in a woman in her early 20s. Since you don't know who you are going to meet until you actually meet them, a sensible first pass is to focus on those in the 19-25 range. That way you are probably not going to miss, at least as far as appearance is concerned,





