A shorter version of the explanation of the double standard

The longer explanation of the double standard

Given at least a minimal attractiveness,

For a woman to choose a man, he has to demonstrate an arbitrary, and many times a totally random quality.

This can be a well studied smirk, propensity to violence, unavailability, intelligence (overrated), humor (overrated), arrogance, wits, assholeness, jerky behavior, sensuality (shoot yourself), persistence, aggression, any dark triad trait, nice shoes, chest hair, etc, etc.

But he has to demonstrate some quality.

For a man to choose a woman, she has to demonstrate availability.

A woman just has to show up.