Keeping it real-
18-26- legal prime(in the eyes of the modern law, but modern law and mentality don't cooperate with nature/God's law)
but biologically, their prime is from 15 yo to 26 yo.
The modern law and mentality robs females 3 year of their physical prime( 15-16-17 year old females, are considered kids while biological reality denies and negates that particular belief) and a lot of people, especially

females and swagless and

dudes think that men going after 15-17 year old women are

pedophiles, while its not even close to be true- by 15 years old a woman can be pregnant, has her periods, and is fairly well developed physically already- add to gmo and hormone growth chemicals in modern foods that gives physically mature bodies(big t*ts and fat asses and birthing hips) to 15 yo girls and its a wrap.
Society still views 15-16-17 year old females as these 5-10 year old innocent, infantile and physically undeveloped young girls playing barbies and shyt.
Society infantilizes 15-18 yo women, but people forget that 100-200 year ago in the West, they were married and were mothers already, and they had a lot of responsibilities because they were expected to cater for their family, raise their offspring and take care of their husband.
And its like that in many parts of the world.
Prolonged economic prosperity, the rise of 3rd wave feminism, etc are factors of this current infantilizing of teenage women.
Absolutely ridiculous.
but 15-26 are the prime years physically and biologically. Nothing beats a 15-26 female who is not fat, carefree when it comes to life in general, full of energy and positivity, without any heavy emotional/physical baggage. And ability to produce healthy kids at peak fertility period.