
Here's the problem. Men are programmed on a deep-seated biological/chemical level to want to fuck. The primordial drive here is to spread our seed and impregnate as many females as possible so our genetic lineage survives and so the species as a whole has a greater chance of keeping on going in the face of adversity (starvation, disease) and predators. That's kind of the whole deal for animals in general. We're animals. Get over that first stumbling block and you'll be fine.
You lay on top of that a variety of factors, like religious and cultural pressures, possibly mild to severe emotional/sexual/mental trauma, and the problems endemic to a committed, monogamous relationship and you've got yourself a powderkeg of possible infidelity.
It doesn't mean men that cheat are the devil incarnate. Shit, it likely doesn't even mean they dont' love the woman they end up cheating on. Sometimes, even, it's not about lack of respect or wanting to control a situation. I think the psychology behind understanding or attempting to understand the reasons for infidelity is probably sound, for the most part, but it's not an absolute blanket answer for all the myriad ways and reasons a man might want/need/feel like straying.
That doesn't mean the woman doesn't deserve monogamy. It's not unnatural to want it or expect it, but every man you're with wants to fuck other women. Will they act on it? Many won't. They might have a strong enough sense of moral restraint or fear of their spouse cheating, in revenge, on them. They might be worried about the effect it will have on their primary relationship. They might just be worried about going to hell or getting an STD. The point is...they never give in to their primordial fuck urge while married or in a monogamous relationship.
Now, it could be that those men just haven't had the opportunity. Maybe they are so uptight or socially awkward that they not only don't put off that "please fuck me" vibe, but also don't put themselves in any possible situation to find some strange to get up in. Maybe they're just physically repulsive or believe they are, at least, so they can't even get any flirt going.
On the other hand, if some of these "good guys" spend their lives without opportunity to cheat or, possibly, have opportunities they turn away because of a higher moral code...it's possible they will eventually break down if enough titties are thrust their way. All it takes is one "will you rub my back" to end a near-lifelong streak of fidelity and shining white-knightitude.
I have a couple of friends who have experienced almost this exact sort of arc in their lifetimes. One is a guy who had multiple chances to screw around on his rather frigid ex but did not act upon it. He hand girls putting their hands on his cock, exposing their tits, but no...he did not falter. Then, he gets married and the sex is great, but he can't stop thinking about fucking his frigid ex. One thing leads to another and then the next thing you know, he's banging his ex on a regular basis for a period of months...doing crazy, depraved shit he NEVER did with her when they were together. How did this happen? WHY did this happen? Does that make him an awful person? I'm not sure, but by all other accounts he's a stand-up guy so is this a fatal flaw? Who am I to say. It's open for discussion.
Another pal of mine has dated his current girlfriend for the past half-decade or more and they couldn't be more perfect for each other. They cuddle, kiss, and do nearly everything effusively filled with lovey-dovey demonstrative behavior. Pretty much, they're in love like whoah. The problem is, he also ends up chatting online with not one but two women that he knows as friends. He has graphic discussions with them about sex and flirts like a madman via social networking and email. He ends up getting drunk at a party and one of those girls lets him feel her up. Next party, more drunkenness and another girl lets him get his hands all up on her sweater puppies. What is it that keeps him from crossing the line entirely and violating his marital code? Opportunity, so far. Had those drunken gropes turned into a "i'll suck your cock in this here bathroom" he'd have likely gone there. Had any of those face-space conversations turned into "please come over and fuck me", he's have been running for his car-keys I'll bet you.
Does this make him a living monster? A completely soulless sociopath? Possibly. In speaking with him about and watching him with his significant other, it's clear that he has no other love but her. I know, for a fact, that he's completely dedicated to her in all other realms.
So, why must he need/want/like to fuck other women? It's the eternal conundrum that is part of being a monogamous man in the Judeo-Christian Western world, I guess, at war with the pure shagging imperative lying just below the surface at all times.
I suppose the easy solution would be to become polyamorous or some kind of swinger. Maybe have an "open relationship". Therein lies the rub, though. I've talked to my guy friends and for the most part we all want to retain the double standard. It might be one of the most egregious forms of hypocrisy, but we'd love to be able to fuck any girl we want casually, safely, and without any impact upon our relationship (read: discretely) but in no way at ALL do we think it's okay for our significant other to go out and do the same. Some of my friends are okay with the occasional three-some if it's in a controlled, planned, and approved environment. Even more of them are down with the thought (if not actual implementation) of regular girl-girl-guy threesomes with nary another cock to be found...but none are really okay with "hey, you can fuck whoever you want and I can fuck whoever I want". I know of "open relationships" like this. I even know of some people that approach friends to participate in regular swinging.
The problems that come from these "solutions" are many and multi-faceted. Chiefly, though, is being able to keep it all in check. If you decide to have a threesome with someone after years of just the two of you going at it and all that you have both built your relationship on has supposedly been about fidelity and monogamy...it can be a hairy situation if you finally do implement your freaky plan. Do you find someone who you know? If so, won't it be weird to see them outside of the "let's fuck this girl/guy until we all explode like a cum bomb and forget our own names" window of engagement? Probably. Do you find someone you don't know? How do you go about doing that? Craigslist? Ew. They could be a psycho, they could have an STD, or worse...they could end up wanting to make it more permanent. You could be staring at the end of your perfect little relationship by introducing a rogue element into play even if it was of your own making. Once that part of the "fence" is knocked down...who is to say it won't just allow wolves into your flock when you're not looking? It's a slippery slope and only the most sexually confident and completely "open" people that are entirely on the same page in terms of boundaries can accomplish it with any modicum of "grace" or long-term success.
So, I have to council my friends to keep their brushes with infidelity on the down-low as much as possible. I let them know that, if they end up faced with an opportunity to get some side-action they need to make sure discretion is in place, disease is not an issue, and definitely keep it casual. The three Ds, I suppose, of cheating. If you falter and find that you must give in to the urge to fuck the girl who works in at the same bakery as you...staying after hours because she claims she needs a backrub even though you've turned off the signs and all the lights, don't let it fuck up your real relationship.
Not sure how you really get past that part. You look at lists of "how to spot a cheater" and some of the things are just obviously dumb things that people do who just don't give a fuck anymore. If you love your significant other, however, and don't want her to know or be hurt by your need to get your wand all up in some other hoo-hah...well, it's possible for you to be fucking up some other way. Something less tangible. Maybe you've become snappish. Maybe you're not being as romantic as you used to be (I don't mean asking for sex, btw). Maybe you start trying to fuck your real girlfriend or wife in the same dirty, over-the-top, porno-style way all of a sudden. Even worse, maybe you end up wanting the kind of lascivious sexual shenanigans you get with those other girls you fuck and forget the name of...and the vanilla sex your love brings to the table just seems somewhat lacking. The worst of these intangibles would be your couplings with your long-term partner becoming as empty and disposable as the ones you have with that girl you just fucked after making a late-night booty call on the way home from the bar.
None of it's perfect. None of it has a 100% workable solution to offer. This isn't about having your cake and eating it, too. It's more about facing the truths that most men in long-term relationships have to face...either on a daily basis or at least at some point in their otherwise monogamous lifetime. We like to fuck. We want to fuck. Eventually, given situation and opportunity, we will fuck.
Those of us that don't? I suppose they're the "lucky ones". They get to retain their purity of purpose and the view available upon the moral highground you can have access to only if you've never cheated before. Once you DO cheat, you can't really point to other cheaters and judge them...at least not in the same way. Deep down inside you'll always know you're just as base and shallow and devoid of will as those you once cast terribly harsh but equally hilarious aspersions upon.



