The female human body is capable of being impregnated once every 9 months.The male human body can impregnate a multitude of woman in that same time period.

What men find sexually desirable are aesthetically pleasing features, but also traits that relate the well being of their future children large breast/birthing hips for example. Ultimately his biological imperative is to spread his seed to anyone who will have him. On average men crave sex 4x's as much as their female counter parts.

Because of this my belief is that woman, evolutionarily speaking, were given the duty of gene selection. If men have strong traits that make them a better, protectors, hunter, provider, woman are more likely to want to pass on those genes to their offspring and find them attractive.

Society has changed quite a bit sense the Flintstones era, masculinity and physical build don't determine your usefulness anymore, right? Except short men statically make less money, and are less likely to hold a position of power, "In more than a century, no U.S. president has been below average height (the last one was William McKinley, at 5 feet 7 inches, and he was ridiculed in the press as a little boy,"

My end thesis is that in modern society the original biological imperative of woman is not gone, its just become more expansive. If you cant check enough of the boxes that demonstrate worth you've got a long road ahead. Even if you manage become the president of the United States the'll still point out whats "wrong" with you.