I believe that the vast majority of people that are unfaithful are monogamous in their beliefs. The ones who are not monogamous in their beliefs either live in poly relationships or consensual non-monogamous relationships, or they have divorced. If it's very bad, then people don't stay married these days in the West. They can be married and have their family, but they want something else - they want something that they don't have in their lives, or simply to be someone that isn't who they are in the context of their marriage.
Esther PerelIn dating, if you say no, your lover goes on to the next person. In marriage, if you say no, the person stays.
Esther PerelOne of the most amazing abilities of sexuality is to momentarily transcend the borders of Self into something that is no longer defined by physical property and that is utterly unique. It's really what many call a religious experience.
Esther PerelIn desire, there must be some small amount of tension. And that tension comes with the unknown, the unpredictable. You can close yourself off at home and say, "Whew, at last I'm in a place where I don't have to worry," or you can keep yourself open to the mystery and elusiveness of your partner.
Esther Perel