It depends solely on the individual, the circumstances leading to the act of cheating and what the cheating consists of. There is no all encompassing statement that proves either way true or false.

People cheat for a myriad of reasons.

If people involved in the relationship refuse to understand why the cheating happens, then they are all better off divorced or broken off from each other, because neither of them will ever learn anything from the act.

If all involved are willing to understand why the cheating happened in the first place and come to the agreement to work on that relationship, as well as themselves, then the chance is a lot lessened.

If however, the person cheating is cheating because s/he can and enjoys it, then that’s a whole different issue all together.

I’ve known people whom have cheated once and after speaking about it, changed their lives, evolved their relationship, they never cheated again. I have also known people whom have cheated multiple times and keep cheating, because they loved ‘blowing off steam’ outside of the marriage, where they otherwise cannot in the marriage. I have also known people who cheated and their partners never forgave them, never bothered to learn why it happened, got divorced and/or broken up and keep getting into relationships where their partners cheat on them repeatedly.

People are dynamic. I am of the mind that people should seriously learn to do self reflecting, rather than just blame other people for the misfortunes that happen within a relationship. Alas, from the looks of many of the other answers, it seems some people, simply don’t want to bother. Too bad. Often times, we can learn a lot about how we are perceived and how much can actually be done to improve our behaviours.