cheating is not something that is usually done for the sake of it. A girl will not cheat on you if you have done your job rite. you should be up in her head, all she thinks about. the thought of another guy touching her should make her want to vomit. improve your game and girls will not cheat on you. if i cheat its because my girl is not in my head where she should be, if she were that would be one-itis or what ever u guys call it. the thing weve been trained to avoid. but with woman its not the case. ur girl should have one-itis for you, if she doesnt then work on your game alot more. you shouldnt be worrying yourself about weather a girl cheats or not you should be concentrating on your self and what you can get from the girl sex and otherwise.
and for the guy that said every one has to cheat once or twice i think you mean people want to experience things they havnt dont before. if you want f**k some ones girl, providing she has never cheated before, you can use this to your advantage"
but to answer your question. any one can cheat at any time. you cannot stop it from happening. life is not linear and you cannot predict nor controll some ones actions. worrying about it is simply foolish. a girl can be dating a symp/afc and cheat on him alot. she can then meet a dj/pimp and never cheat again. its about choice. cheat or dont cheat. if your game is tight u will have eliminated the later option.