Cheating is also something that roughly 50-70% of married people do. Sex, along with food, water, and drugs, is one the basic, biological human compulsions and it's part of the human condition, for a large majority of us, to fall victim to it against our better judgment. As wrong as it is to cheat, it's even more wrong (and more harmful, which is perhaps the same thing) to invade people's privacy and expose cheating.