An open relationship is one whose members have made, say, a non-exclusivity pact. An open couple must fully agree that it is the formula they want for their lives.
In the United States, about 22% of people have had consensual non-monogamous relationships. So if so many people do keep infidelity at some point in their lives, why do some people do so many times more than others? A very interesting book to understand not only how it works but the doubts, insecurities and risks that an open relationship faces us is 'Abierta'