I have understood that due to evolutionary biology, women have developed the hypergamous nature to change their man at a whim in order to ensure personal stability. I completely understand that.

On the other hand, from my observations of real life, I see that men get extremely attached to the women in their life. This leads to men falling in love with their plates (who are plates for a reason), cheating on an LTR but still going home to and loving said LTR, and one-itis tendencies.

I could attribute this to perhaps an evolutionary trait of men historically having a scarcity mindset towards women, but even the top-20% of men who I am close to lament that “one girl who got away” or get their panties in a twist over women who deserve no emotional afterthought.

My question is why? Why do men have such a scarcity mindset towards the opposite sex?