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Approximately 4% of individuals in North America participate in consensually nonmonogamous (CNM) relationships, wherein all partners have agreed to additional sexual and/or emotional partnerships. The CNM relationships are stigmatized and viewed as less stable and satisfying than monogamous relationships, a perception that persists despite research evidence. In our study, we assess the legitimacy of this negative perception by using a self-determination theory (SDT) framework to explore how sexual motivation impacts relational and sexual satisfaction among CNM and monogamous participants in romantic relationships. A total of 348 CNM (n = 142) and monogamous participants (n = 206) were recruited from Amazon’s Mechanical Turk (MTurk. (2016). www.mturk.com) to complete a cross-sectional survey. Participants reported on their sexual motivations during their most recent sexual event, their level of sexual need fulfillment, and measures of sexual and relational satisfaction with their current (primary) partner. The CNM and monogamous participants reported similar reasons for engaging in sex, though CNM participants were significantly more likely to have sex for personal intrinsic motives. No differences in mean levels of relationship and sexual satisfaction were found between CNM and monogamous individuals. Participants who engaged in sex for more self-determined reasons reported increased relational and sexual satisfaction. This relationship was mediated by sexual need fulfillment; participants who reported more self-determined motives reported higher levels of need fulfillment and, in turn, greater relationship and sexual satisfaction. This study indicates that CNM and monogamous individuals report similar levels of satisfaction within their relationship(s) and that the mechanisms that affect relational and sexual satisfaction are similar for both CNM and monogamous individuals. Our research extends theoretical understandings of motivation within romantic relationships and suggests that SDT is a useful framework for considering the impact of sexual motivation on relational outcomes. [ABSTRACT FROM AUTHOR]

Research has traditionally cited pleasure and reproduction as the primary reasons to engage in sex. However, recent research suggests that there are many psychosocial reasons that women engage in sex and that relational factors such as relationship duration may also influence why women engage in sex. Few studies have examined reasons for sex among sexual minority women, although research has suggested that reasons may be similar to and different from those of heterosexual women. Using the YSEX? survey measure, the current study examined reasons for having sex among 229 lesbian, bisexual, queer and questioning women, aged 18-59 currently in a romantic relationship. The most frequent reasons women reported for engaging in sex were reasons related to pleasure and love/commitment. Contrary to theories of love and attachment, women in the current study did not report significantly different reasons for engaging in sex depending upon the duration of the relationship. Women in earlier stages of their relationship were just as likely to report engaging in sex to feel close to their partner, as were women in later stages of their relationship. In addition, women in later stages of their relationship were just as likely to report engaging in sex out of a physical desire for their partner as were women in earlier stages of their relationship. The strengths and limitations of the study, along with implications of the results are discussed. [ABSTRACT FROM AUTHOR]