1. Most men feel lucky and unworthy that their wife chose them to marry. Most people think of marriage as taking a valuable prize "off the market" that the competition is over and that person is yours now and you don't need to worry about them leaving you for bigger better things. Obviously this is not true but most people feel this way nonetheless. Perhaps men feel this even more so because we have had it instilled in us that the woman is a prize, we are lucky if she chooses us because let's face it women are by far the pickier of the two genders when it comes to choosing mates. One look at a dating site will confirm this. We have to do the chasing, its still very rare for women to make the first move in dating and God forbid a woman ask a man to marry her. Men are constantly taught that it is up to us to "pursue" the relationship and "win" her heart. It's something women can never understand especially for men who are introverts. It can be soul crushing. We are forced to wear our heart on our sleeve and risk rejection. Another woman never enters our mind as competition for the same woman. It is always men.
2. When men gather they tend to try to establish a pecking order and there are always assholes that like to think of themselves as alpha regardless of the circumstances. They frequently try to establish their "alpha" ness by basically being a bully.
3. It is often reinforced that when your gf or wife is with another man its because you didn't satisfy her and are a cuckold. It's probably what you deserve because you didn't see to her happiness or your sexual prowess wasn't up to par. Meanwhile the other man is seen as having game and getting one over on you.
4. Porn and regular TV reinforce the notion that two women having sex is something to cheer and celebrate about, not something to fear. Meanwhile porn also shows big dicked black guys and delivery men giving the wife the kind of sex she really craves that her pussy husband could never give.
Now after the prize has been "won" via marriage you start to feel safe. Remember it's until death do us part...right? You don't need to worry about competition right? Another man interested in being with our wife feels like the competition starting up all over again. It feels like winning a race and on the way back home with your trophy, being challenged to ANOTHER race because they want your trophy. I know this objectifies the wife but this is truly how it feels from a man's perspective. What are his intentions? Doesn't he know I won this trophy fair and square? Is he here to embarrass me? Emasculate me? Establish dominance? This doesn't feel fair within the unspoken rules of what it means to be a man in our society.
Women have never been on our radar as competition, only men.
