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This study employed a structural equation modeling (SEM) approach to examine the interrelationships between the self-serving bias and various known predictors of sexual infidelity. Specifically, we sought to generate a path model depicting how the following variables jointly predict sexual infidelity perpetration: (1) insecure attachment, (2) pathological narcissism, (3) sexual narcissism, (4) primary psychopathy, (5) self-serving attributions for retaliatory infidelity, and (6) sexual betrayal victimization. We developed a structural model describing various pathways to sexual infidelity perpetration based on these six variables. Three pathways to infidelity were discovered. In the first pathway, anxious and avoidant attachment predicted primary psychopathy, and self-justification for retaliatory infidelity mediated the relationship between primary psychopathy and infidelity perpetration. In the second pathway, anxious attachment predicted sexual narcissism, which predicted self-justification for retaliatory infidelity, which in turn predicted infidelity perpetration. In the third pathway, being a victim of sexual betrayal directly predicted sexual infidelity perpetration. In fact, suffering sexual betrayal was the best predictor of sexual infidelity perpetration. The clinical implications of these findings are discussed.

This article examines moral hypocrisy and the self-serving bias (SSB) in the sexual infidelity context. We found evidence of self-serving attributions that occur between primary relationship partners following sexual betrayals. Specifically, we found that sexual infidelity perpetrators (a) blamed their primary dyadic partners (i.e., victims) for infidelities significantly more than those victims blamed themselves for such infidelities, (b) blamed the surrounding circumstances for infidelities significantly more than their victims did, and (c) rated the emotional impact of infidelities on their victims as significantly less than victims’ ratings of such impact. Moreover, we found that participants with prior experience as both sexual infidelity perpetrators and victims displayed “sexual hypocrisy” by judging others more harshly than themselves for sexually unfaithful behavior. Our findings demonstrate that personality variables associated with sexual infidelity (narcissism, sexual narcissism, avoidant attachment, and primary psychopathy) are also relevant to self-serving attributions in the sexual infidelity context.

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