Some men cheat compulsively. Although they know that infidelity could wreck the lives and relationships, they do it anyway. If you've got a cheater like on your hands, the best thing to do is let him go. A compulsive cheater needs medical help to overcome his problem. This is something you can't provide, so when you find yourself faced with type of cheater, do yourself a favor and leave the relationship. Some men, like some women, thrive on chaos. There are some men who thrive on tempting fate.