I think there is a higher percentage of women who have the potential to cheat.
Think about music preference. There are certain guys out there who will have a favorite band and will never call anything else a favorite. That's a chunk of the male population. Other males just like whatever is hot atm. Like maybe some Metallica fans.
How many women do you know have that stability in music? Not that many right? Play the percentages, more girls whore their music more than guys.
Now think about relationships in terms of music. There will be alot of guys out there who will be loyal to their women like their rock bands. Thick and thin. Of course there are others not so loyal, and when that hot new band comes out, their gonna want a little.
In some sick and twisted way, women treat relationships like music and can be just as emotionally permiscuous(sp?). They'll go for what is "hot for them" right now. Eventually, the heat wears thin (NOT OUT) and some other hotter band comes their way. What do they do? What choice did they make when Weezer didn't sound as good but now Good Charlotte does? They "buy new CDs" and stop listening to their old ones. Why? Cuz it's new, it's hot, it makes them feel just the way they did when they first started listening to Weezer. Oops? Did I say Weezer?
Another aspect of the cheating woman is the most dangerous for men to hear. It's called "The Factors of the Infidelity Timebomb." Simply put, all women have this timebomb in them, most never know when it's going to go off, but when it does...it's over. Basically women in relationships are happy at a certain point, but when the happiness waivers just a little, the timebomb starts ticking and the factors begin to fall in place. Totally random, and completely different for each female, when the variables of the formula lines up, the timebomb goes off and legs a open. Factors range from anything...age of woman, age of potential, financial status, a fsckin wrinkle that just popped up, a shoe sale, a snide remark you said that morning. Basically anything and everything can help that timebomb go off.
Unfortunately there have been such a large percentage of women with timebomb tendencies, it's hard to tell roughly how many don't have it.
Now everyone's gonna go "well I don't think that will happen, so and so, this and this, that and that." Well, I'm really happy you feel so faithful in your relationship. If you are a guy, I really do believe you think it's all great and good. That's what makes relationships so worthwile. Besides the sex, it's knowing someone else out there truly feels the same way. But the future can never be predicted when you live with a timebomb.
Now don't get me started on how each gender reacts to getting caught...let's just say one will admit to it being wrong and the other will convince themselves that their actions are justified...