The State of Affairs: Rethinking Infidelity (2017) by sex and relationship expert Esther Perel is an examination of unfaithfulness in romantic relationships--what it is, why it happens, and how different cultures handle it--as well as an exploration of what affairs can teach all lovers about healthy relationships. Perel takes a non-judgmental approach to the motivations of the cheater and the outside lover, as well as to the contributions of the betrayed...