A key personality trait is linked to the urge to cheat in unhappy men

A study in Sexual and Relationship Therapy found that men are more open to casual sex and infidelity than women. The research also highlights a strong link between relationship dissatisfaction, the desire for uncommitted sex, and the intention to cheat.

Infidelity has long been defined as a violation of promises and commitments within a romantic relationship, reflecting a failure to uphold expectations of love, loyalty, and support. However, modern views conceptualize infidelity as physical, sexual, or emotional behaviors that violate relationship norms and cause distress and negative relationship outcomes. Exactly which behaviors constitute infidelity varies across couples, as norms regarding emotional and sexual exclusivity differ between relationships.

The most common forms of infidelity are sexual and emotional infidelity. Sexual infidelity usually involves physical sexual behaviors with someone other than one’s partner. Emotional infidelity consists of forming intimate emotional bonds with a person other than the partner that breach relationship rules agreed upon by the couple. Research indicates that sexual and emotional infidelity often co-occur; they are, most often, not independent phenomena.

A key psychological characteristic linked to infidelity is sociosexuality. Sociosexuality is the level of openness to casual sex without commitment. Individuals with higher sociosexuality are more likely to engage in both sexual and emotional infidelity, as their attitudes and desires may conflict with monogamous relationship norms.

Study author Paula Pricope and her colleagues wanted to investigate whether sociosexuality plays a mediating role in the relationship between relationship satisfaction and intentions towards infidelity. They also wanted to know whether these associations are the same in men and women. The authors hypothesized that men would be more inclined to engage in infidelity compared to women and that their sociosexuality would be higher (i.e., they would be more open to casual sex).

Study participants were 246 individuals from Romania. Their average age was 24 years. All participants were volunteers. Sixty-one percent of participants were women. Seventy-two percent were in a non-marital romantic relationship, while 28% were married. Sixty-eight percent of participants were from urban areas of Romania.

Participants completed assessments of intentions towards infidelity (the Intentions Towards Infidelity Scale), relationship satisfaction (the Relationship Assessment Scale), and sociosexuality (the Sociosexual Orientation Inventory – Revised).

Results showed that individuals reporting stronger intentions towards infidelity tended to have higher sociosexuality and be less satisfied with their relationships. In other words, individuals more willing to cheat on their partners tended to be more open to uncommitted sex and less satisfied with their relationships. Men tended to report higher sociosexuality and higher intentions towards infidelity than women.

The authors tested a statistical model proposing that lower relationship satisfaction leads to higher sociosexuality, which, in turn, increases intentions to cheat. The results indicated that this pathway was significant specifically for men. For male participants, lower relationship satisfaction was linked to higher sociosexuality, which then predicted higher intentions to cheat. However, this mediation pathway was not significant for women.

The study contributes to the scientific understanding of infidelity. However, all study data came from self-reports, leaving room for reporting bias to have affected the results. Additionally, the design of the study does not allow for causal inferences.

While it is indeed possible that lower relationship satisfaction leads to increased sociosexuality and infidelity intentions, it is also possible that higher sociosexuality and infidelity intentions reduce relationship satisfaction or make it harder for a person to be satisfied with a committed relationship. Other possibilities also remain open.

The paper, “The roles of sociosexuality and gender in the relationship between relationship satisfaction and intentions toward infidelity: a moderated mediation model,” was authored by Paula Pricope, Tudor-Daniel Huțul, Adina Karner-Huțuleac, and Andreea Huțul.