Thanks man. Your post highlights the laws of nature as well, how guys with bigger dicks shame guys with smaller ones into retreat from competition for breeding rights. And how women will do similar, albeit subconsciously. And as @Tonyjf50 said, we don't feel jealous by it - because we subconsciously know the science as well. A bigger, longer cock on an alpha male is more likely to deliver the payload to propagate the species much better than our smaller ones. It is possible to extend this logic to say that anything we can do to assist this science is natural as well. This is why men like us do not become jealous and encourage our wives to engage in such behavior. We also find ourselves advertising our wives with pictures, and seeking out doms, bulls and partners, and then assisting their congress with our wives. Sometimes to the point of being willing to lube up the bigger cock, or even suck it, to prepare it for our wife's vaginas. Some will say "I would never do that" or "that's gay" - but those excuses are just a function of human teaching and societal taboo trying to override nature. Remove those barriers and underendowed guys will naturally revert to the beta role as a mid-wife for the bigger cock to more deeply seed their woman. Including all the prep work such as getting it hard, keeping it hard, ensuring it can glide, ensuring it's inserted and then encouraging it to thrust hard and deep for as long as needed to ensure the most successful, deep and potent womb flooding and egg splashing possible. This is also why many cucks prefer to watch rather than participate in their wife's dalliances - their smaller cock really has no role in the above. Almost all aspects of cuckolding manifest this logic in one way or another...
There are many great replies on here regarding our reasons for what we do, but I think your comment here hits the target the best I have ever read. Thank you for posting.