One of the primary things that keeps people in relationships with each other is need for unconditional love and need for physical comfort and safety.
By believing in the theory that men are driven by a primary need to “spread seed” and women to “protect nest,” we aren’t just subscribing to some abstract theory of evolution. We are also subscribing to a much broader set of ideas and beliefs that effect our day-to-day lives, which have nothing to do with evolution. They are ideas that keep power structures stable.
This idea of evolutionary urges insists that there are wide, gaping differences in the needs of men and women sexually, and that those needs are the most powerful of all needs. That women need men to “stick around,” and so are neurotic or otherwise not good enough if they are single or can “catch” a mate. This has implications on women’s self-image and worth, and implications that the sexual identity of women is completely contingent on a man’s sexual desire for her.
For men this theory tells them that they don’t need emotional and physical comfort and unconditional love and attention from a stable community. That if they don’t think about and desire sex 24/7 that there is something “wrong” with them. And it gives monuments of excuse for a “boys will be boys” attitude that not only allows sexist and misogynist men to continue their sexual harassment and prejudice, but encourages new generations that this is the way to gaining acceptance, it’s a right of passage.
As individual groups, men and women both suffer from this extremely simplistic theory, which excludes many factors of culture and not-biological conditioning that influence behaviors.
And then there is the need thing again. In relationship, this dynamic causes women to have more percieved needs from men in day-to-day life than visa versa. And therein lies the emotional support structures for a power differential that keeps men “needing less” and having more power over women who “need more.”


