Some insist that emotionally confiding in anyone other than your partner is a betrayal. Such “emotional infidelity,” research shows, tends to be more troubling for women, while men deem sexual interaction as a greater offense. In surveys, partners’ definitions of what constitutes emotional betrayal range widely, leading to potentially devastating misunderstandings. But a sense that one’s partner may become more dedicated to someone other than themselves is central to worries about emotional infidelity.