It pretty much means, that as a man you work your ass off, you slowly progress and from a looser nobody you work yourself up the ladder and eventually become a well established, desirable man. As a man your sexual market place value starts low and grows with time.
For women its the exact opposite. While they are young, pretty and fertile, every man desires them. The sexual market place value is front loaded without them doing anything but existing and they are loved simply for being women, and the more attractive they are the more stuff and attention is showered upon them. However, once they first and second fertility windows starts closing, meaning the age of 24 and 28, so does their look > just like the proverbial milk, start souring.
Women grow visually older faster as their body undergoes menopause (but keep in mind they live longer then men) and their reproductive abilities completely turn off.
Thats also where the saying "Women are human beings, men are human doings." Comes from.
Meanwhile a healthy male can still reproduce late in his 60, some specially virile men even up to 80. Due to the hormones and what not being still in the system, it causes men to age more graciously.
And assuming you worked your ass off and did the mostly correct choices in your life, to not F* yourself over, now as a middle aged well established guy you have reached your peek value and became more desirable to the young girls who are currently at their peek SMV as well.
Men and women are not the same, they were made different by nature, and no amount of neo-communist Leftist social engineering and brainwashing will change that. Nature always wins in the end, and course corrects any human stupidity. But I digress, politics is no good, sorry.