Abstract Black and Latinx men who have sex with men (MSM) have the highest risk of HIV of any group in the U.S. with overall prevalence ranging from 21% to 28%. This ratio could be even higher among Black and Latinx MSM belonging to the House Ball Community (HBC), an understudied subculture comprised primarily of Black and Latinx sexual and gender minorities (primarily gay and bisexual men), with documented HIV prevalence ranging from 4% to 38%, the majority (76%) of which remain undiagnosed. These data mandate urgency to build upon and expand the repertoire of culturally-congruent interventions that reduce HIV risk for Black and Latinx MSM, especially among members of the House Ball Community (HBC). HBC-MSM often seek sexual health advice from trusted and influential members of social and/or sexual network members and such advice has been linked with less sexual risk behavior, although evidence is mixed. Basic Psychological Needs Theory, a sub-theory of Self-Determination Theory (SDT), will be utilized as a framework to further understand how sexual health communication influences sexual health behaviors of HBC- MSM. The proposed quantitative study will advance this goal by describing characteristics of sexual health communication embedded within social and sexual networks, and identifying the effects of sexual health communication on sexual health behaviors among a sample of Black and Latinx HBC-MSM. Such knowledge is necessary to expand understanding of how sexual health communication impacts sexual health behaviors. The study provides an unprecedented perspective on sexual health preferences and motivations as participants socialize and function in HBC. The information generated on the effects of autonomy support on sexual-risk behaviors will help improve current HIV prevention interventions, as well as inform the development of future interventions, tailored to HBC-MSM.

PROJECT NARRATIVE Recent evidence suggests that Black and Latinx men who have sex with men (MSM) in the U.S. who belong to the house ball community (HBC) may be more disproportionately impacted by HIV diagnoses than the general populations of Black and Latinx MSM, nationally. This study will be the first to employ egocentric social network analyses and structural equation modeling to characterize sexual health behaviors and test associations between autonomy supportive sexual health communication and sexual health behaviors among a sample of Black and Latinx HBC-MSM. The results of this project will inform the development of effective interventions tailored to Black and Latinx HBC-MSM in urban settings.