It seems to me that betrayal is not a concept, it is a process and a chain of conclusions, as well as experiences and ideas. If you analyze the process of relationships itself, it looks something like this: a woman and a man entered into a relationship, began to satisfy a greater part of the needs with each other and expect that they do it and will do it only with each other. But something happened in the relationship (resentment, quarrel, cooling of one towards the other, or something else), and one of the couple (man or woman) stopped satisfying (here you can substitute anything - the opportunity is gone, you need to invest more to get desired) some need with your partner (physical, emotional, mental), went and satisfied it with another person. The key is that it doesn’t matter what need was satisfied with another person. The important thing is that each of us has the concept of “treason” inside us. For some it’s just sex, for others it’s cute flirting with another person. When we get into a relationship, we don’t talk about this part - cheating. Who has any thoughts, expectations and ideas. And when faced with any behavior from our partner, we regard it as betrayal. In my opinion, there is no clear definition of the concept of “cheating.” Because it is very individual. And if you describe it in one phrase, then “This is when it’s not with me...” and in place of the dots, everyone substitutes their own.