The way you make me feel: an ecological momentary assessment study on couple similarity in sexual arousal and its sexual, relational, and affective correlates.

Background: Although sexual arousal is commonly experienced in the daily context of relationships, most of what we know about sexual arousal comes from studies on individuals, often conducted in a laboratory context.

Aim: To explore to what extent similarity in levels of sexual arousal during nongenital physical intimacy (ie, cuddling and kissing) was associated with each partner's affect as well as sexual and relationship satisfaction.

Methods: Ninety-four cohabitating couples (mean ± SD age, 26.30 ± 7.60; 88 mixed gender, 6 same gender) completed 6 ecological momentary assessments a day for 10 consecutive days. We used response surface analysis to examine the associations among the degree and direction of similarity in partners' sexual arousal and affective, sexual, and relational outcome variables.

Outcomes: Sexual satisfaction, relationship satisfaction, and positive and negative affect.

Results: Sexual arousal levels covaried only when partners engaged in physically intimate behaviors, unlike affective responses, which covaried within couples more globally over time. Within-couple similarity at high levels of sexual arousal was positively associated with women's sexual satisfaction but unrelated to men and women's relationship satisfaction and affect. Individual- and couple-level sexual arousal was positively associated with men's sexual satisfaction and women's sexual and relationship satisfaction. Couple-level sexual arousal was relevant to men's affect such that positive affect was higher when sexual arousal levels within the couple were high. Our analyses also revealed a discrepancy effect in that women's positive affect was higher when their own sexual arousal levels were higher than those of their partners.

Clinical Implications: These findings suggest that as long as sexual arousal levels within a couple are sufficiently high, sexual arousal similarity and discrepancy can be beneficial to one's well-being, supporting the relevance of therapeutical techniques aimed at increasing arousal levels to promote a better affective and relational climate for couples.

Strengths And Limitations: This study is the first to test the daily associations among sexual arousal similarity and its correlates in a sample of cohabitating couples, providing a more comprehensive view of the interpersonal dynamics through which sexual arousal may influence individual, relational, and sexual well-being. Given our sample's relatively young age, as well as high sexual and relationship satisfaction, the results may not generalize to couples experiencing sexual or relational distress.

Conclusion: Within the context of daily relationships, individual- and couple-level dynamics of sexual arousal were associated with sexual and relationship satisfaction, as well as with affective responses of relationship partners.