I prefer ladies in their 20s, 18-29 are great ages
there's studies made where they ask men what they are attracted to the most,, and across all ages of men regardless if the man is 20 or 90 men are attracted to women ages 22-23 the most.
So it seems womens prime on average is that age, and mens sexual preference to that never change regardless of their age.
womens preferences of age increases as they age themselve to a point. Likely because they have a mating strategy which includes provider-ability(which is a feature men don't take in account in a woman at all).