Infidelity is a universal phenomenon that is continually becoming more and more common, as demonstrated in recent statistics from the United States, Europe and Latin America. 'Negative fidelity', is a new term now considered to be when a couples union is maintained due to fear, irrational obligations, and economic or social interests. Walter Riso asks if it is truly possible to be faithful in the world today. Recalling his clinical experience and life stories, he analyzes this topic without implying prejudice or false moralities. Being unfaithful involves some type of affective sexual scam and it always leads to suffering and disappointment. This book dives into the discussion of why, regardless of the negative effects, it is increasingly occurring.