to the 'older vs. younger women' argument touched on back here. There's a line in this book that came to mind, and I finally dug it up:
A beauty like Clodia's was not something a woman could be born with. It consisted of more than what they eyes could see, of a mystery behind the flesh which accrues only with the passage of time.
I understand this exactly; why most 25-year-old women, no matter how pretty, cannot compare to a woman of some years and experience.