First, because this kind of person is cheap, you will find that this person is good everywhere and can bring you a lot of happiness in a bottomless love. But once it rises to marriage, you will find that love is really too easy and marriage is really too difficult. Some people cheat even if their wives are good, because their conduct is low. In their world, the bottom line is something that doesn't exist.
Second, people who cheat are generally extremely distorted and abnormal. People who can cheat are extremely twisted and abnormal. Because what they pursue is the excitement brought by this nondescript love, such people are fundamentally psychologically distorted. If you are not a psychopath, how can you cross the moral bottom line to cheat? Therefore, the degree of psychological distortion of derailed people can be imagined.
Third, people who are not determined and have no sense of responsibility are likely to cheat in marriage. People who are prone to derailment are people who are not determined and lack a sense of responsibility for their families. A person who can't even stick to the bottom line of marriage is also a very failed person in ordinary life or work. Because a failed life will aggravate their infidelity and make them feel extremely inferior, they rely on so-called infidelity to win back some face and show that they are loved by many people.
If you are interested in this kind of emotional topic, you are welcome to comment actively and participate in the discussion of this topic.