Why do women cheat? Well, as I had said on the topic of, "Why do men cheat", it also comes down to the standard copy of what a female is. When a female is born, it also goes through a pre-birth stage where the brain is enveloped by testosterone, but not a much as males. It almost as if its a mixture of estrogen and testosterone. For some reason unbeknownst to anyone, as far as presentable facts are concerned, females were always different than males. Just like the chromosomes of males it has an X, but while males have XX chromosomes, females have XY chromosomes, which can be considered a basis of why a lot of things are different between the two base sexes. Which leads me to believe, if that can be considered as a starting ground for the reasons why there are differences between the two, that they will be exploited. However, since females aren't birthed with as much testosterone as males they aren't as bold, daring, or courageous as males would be. Again, they will all vary between different people. However, since compared to males, this would make females seem, not as confident, or sometimes even as far as insecure, compared to males. Now just like males if they don't like what they have or don't have what they want, their thought will to be find something elsewhere that is better for them. That is only the thought of what starts it, whether they act in it depends on how much insecurity they think they have or if they are even good enough at all. Restating, they will look for what they think they want or need. Whether or not they can act on it depends on them. Again, this will vary between different subjects.