Many of us are able to forget about our bad behavior and this selective memory makes us more likely serial cheaters. At some point in our lives many of us somehow cheated. Perhaps it was a test in elementary school or the copying of math homework my best friend. It may be there was a test or maybe you have changed partner. No matter where you engaged in fraud, it is important how you felt afterwards? You overcame the guilt and is ready to open up? Feel a bit of guilt, but are willing to live with that? Or you have the ability to forget about it almost instantly, to be in readiness to move on to the next hype? This scenario may seem vaguely familiar, as obviously you really don't remember anything. Then, we can assume that such behavior is scientifically explainable reason. Who cheated will always cheat? The concept of "selective memory" is well known. But this selectivity may depend on repeated deception. In scientific language this is called "unethical amnesia," and, according to the researchers, this phenomenon compels us over time to distance ourselves from our bad behavior. Researchers interviewed study participants, to learn about the facts of infidelity outside their primary relationship, and do not realize whether they are in their half of the same. The results clearly showed that people who cheated in the past, three times more likely to repeat the scenario of infidelity compared to those who remained faithful. It turned out that we can forget their own faults, but others we remember very clearly. As a result, the researchers found that we can minimize and forget about the unethical behavior in the past because it helps us to maintain a positive image of themselves.