I don’t really see the point of this thread, as any answer is going to be hopelessly subjective.
Some people are attracted to older men/women, others to younger men/women. Who cares?
That would be an odd time for the clock to start ticking, given that the “end of puberty” is prior to both the peak of fertility and the age of minimum risk of childbirth.
18 is the peak i think, nothing hotter
I think it varies as one gets older. I was very interested in college-age women when I was in college. Now they look like children, and I’m not interested in children. Women who used to seem old are now much more appealing.
That’s a standard line? Damn. I thought I’d invented something original. Oh well.
I find that as I get older, the more people I find attractive.
Well, there’s attractive, and then there’s practical to act upon. Most women I know think young men in their early twenties are most attractive, but wouldn’t want to actually date one.
So while it’s true that men remain “dateable” into later years, a 60-year-old man is not “more attractive” than a twenty-five-year-old.
We need better defined terms fo this discussion. I propose “dateable” and “shaggable.” It seems to me that the OP is asking about pure “shaggability.”
SWMBO is closer to 60 than 50 and gets checked out constantly by guys.
My days of being a boy toy for the ladies were over a lonnnng time ago. 
Well obviously a young woman in her early 20’s is at her bodies peak of slimness and her hormones are at the high point. But in terms of knowledge?
As for me give me a woman with sexual maturity who knows what her body needs plus knows alot about satisfying a man.