A theoretical model was tested, in which better perceived social network support specifically for a romantic relationship was hypothesized to predict higher relationship well-being which, in turn, would predict more positive mental and physical health outcomes for relationship partners. Furthermore, the model was tested on participants in both same-sex (i.e., homosexual, n = 183) and mixed-sex (i.e., heterosexual, n = 275) relationships. Structural equation modelling indicated that the hypothesized model did fit the data very well; furthermore, no differences in model fit were found between the two relationship groups. Support specifically for the relationship remained a highly significant predictor of the outcome variables, even when general social support and support for one's sexual orientation were controlled.

We examined the stability of same-sex and other-sex attractions among 294 heterosexual, lesbian, gay, and bisexual men and women between the ages of 18 and 40 years. Participants used online daily diaries to report the intensity of each day's strongest same-sex and other-sex attraction, and they also reported on changes they recalled experiencing in their attractions since adolescence. We used multilevel dynamical systems models to examine individual differences in the stability of daily attractions (stability, in these models, denotes the tendency for attractions to "self-correct" toward a person-specific setpoint over time). Women's attractions showed less day-to-day stability than men's, consistent with the notion of female sexual fluidity (i.e., heightened erotic sensitivity to situational and contextual influences). Yet, women did not recollect larger post-adolescent changes in sexual attractions than did men, and larger recollected post-adolescent changes did not predict lower day-to-day stability in the sample as a whole. Bisexually attracted individuals recollected larger post-adolescent changes in their attractions, and they showed lower day-to-day stability in attractions to their "less-preferred" gender, compared to individuals with exclusive same-sex or exclusive other-sex attractions. Our results suggest that both gender and bisexuality have independent influences on sexual fluidity, but these influences vary across short versus long timescales, and they also differ for attractions to one's "more-preferred" versus "less-preferred" gender.

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Structural equation modelling was used to assess the strengths of the links between sexual satisfaction and self-reported (a) relationship well-being, (b) mental health, and (c) physical health for women in same-sex (i.e., homosexual, n = 114) versus mixed-sex (i.e., heterosexual, n = 208) relationships. Participants came from a large-scale Internet study. Sexual satisfaction was found to be an extremely strong predictor of relational well-being, a strong predictor of mental health, and a weak to moderately strong predictor of physical health. A two-group comparison model indicated that the strength of these links was the same, regardless of whether the women were in a sexual relationship with a man or with another woman.

In an online study, measures of subjective sexual experiences in one's current relationship were compared across four groups: Men and women in mixed-sex (i.e., heterosexual) and same-sex (i.e., homosexual) relationships. Results indicated far more similarities than differences across the four groups, with groups reporting almost identical sexual repertoires, and levels of sexual communcation with partner. Men reported experiencing somewhat more sexual desire than women, while women reported slightly higher levels of general sexual satisfaction than men. Those in same-sex relationships reported slightly higher levels of sexual desire than those in mixed-sex relationships. Compared to the other three groups, heterosexual men reported deriving somewhat less satisfaction from the more tender, sensual, or erotic sexual activities. Implications of these findings for sex therapists are discussed.