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People who lack quality relationships are more likely to engage in infidelity but how relationship quality is associated with infidelity is less clear. One psychological mechanism that might help to explain these associations is sociosexuality. Here, we tested two models in which we assessed whether overall sociosexuality and sociosexuality subscales (i.e., attitude, behavior, desire) explain how relationship quality is related to infidelity intentions by sampling individuals in exclusive relationships (N = 219). We found that individuals with lower relationship quality had more unrestricted sexual orientation, which in turn predicted a greater intention toward infidelity. In addition, lower quality relationships were associated with greater intentions toward infidelity through behavior and desire, but not attitude dimensions of sociosexuality. [ABSTRACT FROM AUTHOR]

The Dark Triad of personality has gained much attention in the literature, while the lighter side of personality has not received comparable attention. This study aimed to examine how the Light Triad of personality traits (Faith in Humanity, Humanism, and Kantianism) differs between Tinder users, and how these personality traits are related to motivations to use Tinder for short- and long-term mating. Cross-sectional data from current Tinder users (n = 130), past Tinder users (n = 56), and people who have never used Tinder (n = 121) were examined. The results revealed that compared to Tinder users, nonusers have higher scores on Kantianism, which might be related to Kantians not emphasizing attractiveness, a factor that has a role in online dating success. Further, Tinder users with higher total scores on the Light Triad were found to show higher motivation to use Tinder for long-term mating, whereas a significant relation was not found motivation to use Tinder for short-term mating. Long-term mating requires establishing a cooperative relationship with someone, and the motivation to use Tinder to find long-term mates may be due to the cooperation-promoting nature of the Light Triad. [ABSTRACT FROM AUTHOR]