Guys cheat for several reasons. Some cheat because they have a hard time settling down with one person. It’s like being in a candy store they just like so many different kind that they just can’t come out with one piece, they have to try as many as they can. Another reason they cheat is because they claim that whoever they are in a relationship with at that moment is just not doing it for them anymore. And another reason is because you allow it. Put your foot down and do not let it go if that’s not what you want.