Biological explanation for cuckolding

First off, I'm looking for replies in my topic [url=https://www.cuckoldplace.com/1_20474_0.html][/url]. I need some advice.

In Robin R. Baker's book 'Sperm Wars' a biological explanation for cuckoldry is given.

Sperm is designed to ******* each other in its fight to reach the egg. So when we think of another man fucking our partners, our cock gets extra hard and we come quicker (and with more potency) because our sperm wants dominance over the other man's.

From what I've heard, most men have this fantasy, but it takes some balls to admit to it and even bigger balls to pursue it.

The only things I'm struggling with is whether or not cuckoldry is condusive with love and self esteem.