People have been cheating on each other since the beginning of mankind. You just know there was some caveman that got his head smashed in with a rock for going after another man's cavewoman. It's an unfortunate fact of life that far too many people are forced to deal with at some point. The rise of technology has made it easier than ever to cheat on your partner in more ways than anyone could have ever imagined. You don't even have to physically cheat on someone for it to be considered cheating anymore- plenty of people have managed to dig themselves a hole by sexting with someone they've never even met in person.