I agree with most everything you put forth and it should be noted that men have a keen eye and ear(you can hear age or feigning of age) for women over 21 and especially for women over 35 working to achieve the look of someone 10 or more years younger. We can see it and while you may look pretty good, the attempt is evident and off-putting. No one wants to see a 40 year old prancing around in the latest youth fashions like her teenage daughter. Even worse is when the voice inflection and vocabulary reflects those sentiments.
I have in my profession been in contact with women of all ages and girls ages 14-18. Without a doubt, if I removed context and placed these young women in a bar, I could not tell the difference between most 16-18 year old girls and those women who are 19-23. I think some women are late bloomers and continue maturation until age 23. The only differences in that time period, most times, are individual fluctuations in weight, skin tone (tanning) and hair. There are also plenty of 15 year olds who would pass for 18-20.
The point of all of that is not to sound like a "pervert" but to ilustrate that women do not change much (for 10 years) in outward physiology after they bloom (14-18). Belive me... I'd say that when they arrive at 25, they either start to show attractive maturation if they eat a well balanced diet, avoid overexposure to the sun and stay fit OR they start to show more age.
Most females I've seen in singles postings who are 27-30, look a few years older than me. Maybe it's false advertising or maybe not, but their faces and limbs start to look more masculine. Maybe it is false advertising. I have worked with many women aged 27-32 whom I consider at the appex of attractiveness.
We have set the parameters for physical attractiveness and base primitive instincts. What about attitudes towards the opposite sex?
How do women under 24-25 differ from those older? To me they are more laid back and less cranky, but they are also more prone to be lead by their emotions.
Later
(Waiting for some crossfire)