Most of the men I know who have cheated have done so not for any deep emotional reason. They have cheated because (and in their own words):
1. I was horny and my wife wasn't there and I'm entitled to/have to get off whenever I'm horny bec that's just the way men are, honey.
2. It was just sex, not emotional, so it doesn't count.
3. It was a quickie, so it doesn't count.
4. I didn't get fully undressed, so it doesn't count.
5. We were at a bacherlor party and they hired hookers and I'd look like a fool if I didn't use one.
6. My wife wouldn't do xyz that I learned about on the internet, so I HAD to seek out another woman to fulfill my needs.
I think the most shocking stories I heard were from a relative I"ll call Bill, about his one-time friends. Small town boys, goodie goodie kids, brought up strict Catholics, only dated one or two girls before getting married, have 2 kids, good jobs... and whenever they'd have a bachelor party they'd hire the town hooker to service the entire party or if the host didn't have enough money, they'd do a raffle for her services. Yes, the town hooker who looked like she was 70 years old with no teeth (and I won't tell you why no teeth was a good thing.) Bill said he actually could not comprehend how any man got himself...ready to take advantage of her services and left in total disgust, wondering who these guys really were.
When that hooker got 'too old' she brought along her granddaughter, who Bill said looked all of 13 and even that didn't stop these guys from using her. Bill said he turned to one of the guys and said, "HEY. Isn't your DAUGHTER the same age?" GUy said he could care less, free was free, and undid his belt buckle. Bill swore he never used the hooker and would leave before the public sex would start. Yes, public sex. These guys would rent a back room at a local bar with a pool table and have sex with the hooker on the pool table, while all the guys waited their turn. Yup, good Catholic boys who went home to their good Catholic wife and their good Catholic kids and went to mass the next day.
BIll stopped going to these parties because he said he found them disgusting (although it took him quite a few parties to come to that decision.) And no one, including my relative, ever called the cops when this hooker brought in a very young-lookin girl. Oh, and did I mention that no condoms were ever used?
After hearing that story and having it confirmed by another guy (see #5 above) who attended the parties, I really wonder just how we are bringing up our sons that they have no compunction about behaving in ways that are illegal, immoral, and unhealthy.