Infidelity is one of the most painful, divisive and contested relationship topics out there. With high rates of self-reported cheating, it is a very real problem that affects a lot of people. In this episode, Dr. Valeria and sex coach Sarah Martin discuss eight common reasons why people cheat (according to a new study); why these reasons are so common; and how we can navigate the complex world of relationships to better deal with the threat of infidelity.