Suppose a man is not getting his needs met at home. His wife is not necessarily being cruel or mean spirited about it, nor is she seeing someone else but all the same, it's not happening. Now, he goes to the office. Maybe the secretary or a co-worker is an attractive young woman. She looks up to him, respects him, and admires him, initially strictly from a professional viewpoint. He goes to work, maybe after a few weeks or a month of a dry spell, maybe longer. The young lady asks him how he is doing, how the family is. Sure, initially he lies like most people do. "Everthing is fine, doing great." But how long can that last? Something will eventually betray him, a look, the tone of his voice, something. She will pick up on it. She, being a caring friend, puts her hand on his hand, or shoulder. Maybe even gives him a hug or a friendly kiss on the cheek. It will be ok, she comforts him, things will get better. But it doesn't. She sees this. Her compassion turns to a caring affection. She asks him out to a drink, or coffee, or lunch. This might happen a few times. Or not, but either way, the affair is well under way. It is only a matter of time before his armor cracks and he pours out his heart to her. Filled with sympathy, and a lack of understanding on how a wife could treat her husband this way, she tenderly kisses him. At this point, passion takes over, they find a room in a hotel, and the affair is in full swing.
Take note here. Where did the affair start? Did he walk into the office, look the woman up and down, and say, "Sure, my married life is great, but fuck it all, strip down and let's go at it." No, not even close. It started at home, where his needs were not being met. A man isn't going to have an affair because he wants to find a woman who will suck his cock when his own wife won't, not if she's meeting his needs. It doesn't even have as much to do with a release. Jacking off would take care of that. Find me a halfway normal guy who wants to jack off instead of having sex. You won't. Taking care of your man's needs is exactly that: taking care of him. Your respect for him by taking care of him will keep him from straying. Again, this may not be a hard and fast, but you will find this to be a typical rule.
As a final note to the ladies, please understand something. Your man needs you physically as you need him emotionally. It is not a lesser or different need. It is exactly the same as you needing him to talk to you or tell you he loves you. Would you like him to go several days without speaking to you? You would be incredibly hurt and likely furious. What if he's not in the mood, or doesn't feel like it, or has a headache? You would never accept that. Maybe for a day, but no more, if that even. Again, I reiterate this because it is so important to understand, what emotional needs are to you, physical needs are to him.
Hopefully, this was of some use to someone. I sincerely hope this might help someone before the affair is underway. Take care of each other needs, and you will live a happy life.