"I Swear I Will Never Betray You": Factors Reported by Spouses as Helping Them Resist Extramarital Sex in Relation to Gender, Marriage Length, and Religiosity.

Studies suggest that married people frequently engage in intimate relationships with people other than their spouses, and the literature has extensively examined motives for doing so. However, less is known about what factors prevent spouses from engaging in extramarital sex. While investment theory, interdependence theory, and moral theories offer insights into this question, they have not been subject to much empirical research.