"Men will always want other women" - David Deida
I get it. I don't like it, but I get it. Any man who disagrees is either a damn fool or a liar. For me, there is one important piece that must be handled first. You must be able to be completely independent of your woman.
What I mean is that you can live your life, completely unchanged, if she were not in it. You must make enough money to support yourself. You must have the mental strength to be on your own. And, you must have the resources to clear your life if she becomes a problem. Own your own house. Have her rent from you. Keep all finances separate.
If you have a tight handle on your finances, and can afford all of your expenses and maintain a decent life,then you're there. Additionally, you must have cash to pay for a moving company to get her out. Because for me, if it's over, I'm calling a moving company to move her $hit out of my house ASAP. Personally, it's much less of a headache to do it this way. If my lady did something horrible, I could literally have her out of my life within a week, and refurnish my house by the end of the month. An inconvience? Certainly. An impossibility? No chance.
With that said, cheating is more about opportunity than it is about seeking it out. And where there is opportunity, women "will move mountains to be with you." This means they will do all sorts of crazy stuff, modify their schedules, etc. to see you. And it's just a matter of creating more opportunities, spending more time out what the the guys, chatting up women at work, grabbing a bite at a restaurant after work, anything... The big key is zero consistency. If the woman expects you home at 6pm every day, when you're late, it's going to be difficult. If you keep your life random, then there is no way of knowing what you're up to. If you pass out on a buddy's couch, there's no way to tell who's couch you slept on and whether or not you were alone.
Every guy would jump at the chance of a hot woman creating opportunities. It's just part of life. The key is understanding the consequences and being able to handle them of you're caught. I have kids, so there is obviously much more hesitation because there's others I have to consider. It's all a simple matter of risk management, just like judging red flags when courting a woman. Reduce your risk as much as possible, then gamble with the set of consequences you think you can handle. Because when you pursue a woman outside your relationship, that is no different than rolling the dice at the craps table.
So, to summarize...
1. Be able to drop her
2. Keep your life random and busy
3. Also good... Minimize texts, emails, and phone calls