People cheat for X amount of reasons, some people are just generally NOT built for commitment, some are not ready to be exclusive to one person but are fooled by their emotions. Some people are generally good partners but are weak in the presence of an ALPHA. Sometimes you go out with no intention of cheating, you go out and stay out thinking about your partner but you meet a very persistent person, and that person is good at doing what they do. I find that women have a harder time when dealing with this whole cheating thing, women get approached so much, hence increasing the chance of infidelity. the cheating thing is too complicated to pin point, theres too many reasons.
BUT, i repeat BUT IT HURTS more to a man when his lady cheats than it does to a woman when her man cheats...its like women are pre-programmed to know that their man is a predator and if she doesnt work hard he will find new prey.
Once is happenstance. Twice is coincidence. Three times, it's enemy action