Teenagers and young 20's are blood-doped by their own bodies. Powerfully directive hormones cloud their judgment and impulses, and their perception of reality is dimmed by what one writer once described as "a green haze of concupiscence."
Age 30 was merciful to me, personally, as the teens and 20s began to recede gently.
Sidebar/OT: A psych study done by a California university (I think it might have been Stanford) showed that teenaged girls are powerless to resist the hormonally-directed urge to pick up an unattended baby. Every. Single. One. of them went straight to the baby and picked it up as soon as she saw it. No exceptions, zero, none.
This particular hormone recedes and disappears by age 28. Women who care for others in their 30's are on autopilot or "muscle memory"; and in their 40's they snap out of it and, it is suggested, suddenly rediscover themselves, recover their inner Gloria Steinems (or Sarah Bernhardts) and bounce their comfortable, settled-in, and utterly surprised husbands out of the house.
Fine, people experience strong urges. That does not change the fact that they decide to act on them, and it doesn’t change the fact that they often decide to put themselves in situations that stimulate the urges.
I am extremely dubious about any studies that purport to provide scientific information about women’s hormones over a period of time. It is impossible to assemble an experimental group of reasonable size, of women whose hormonal systems are a) testably alike and b)unaltered by externally-consumed hormones, and then to continue to measure the same women over many years.
Remember the “scientific proof” that women’s fertility peaks around age 27? It was all over the MSM. There was one study, in a group of fewer than 200 women of a plain-living German evangelical sect. The “proof” that their fertility, their physical capacity to conceive, declined was that the spacing of their children increased. There was no measure of the husbands’ fertility, or of the frequency and timing of intercourse, or of the effects of breastfeeding or nutrition ... just, “The first two babies were 18 months apart, but then there was 21 months before the third and 23 months before the 4th.” This was “proof” of a generalization about all women, everywhere, in all conditions.
In summary, if you have a link to the studies behind your statements about girls and women, I’d be interested in seeing them. However, even if every contention could be proved with rock-solid evidence, human being STILL choose their behaviors.