Recent changes in societal acceptance of lesbian, gay, bisexual, transgender, and queer (LGBTQ) identities have been accompanied by a younger age of coming out (around 14); however this age is also accompanied by a developmental period of parental, peer, and social regulation of gender and sexuality (Bauermeister et al., 2017; Russell & Fish, 2016). Communication about sex and sexuality between parents and children during this developmental period is crucial in shaping the sexual attitudes and behaviors of youth (Flores & Barroso, 2017). Excluding specific information and concerns faced by sexual minority youth negatively influences their sexual socialization and overall wellbeing. This paper will identify the ecological factors that affect socialization of sexual minority youth through parent-child sex communication. The informational needs of gay, bisexual, and queer (GBQ) cisgender-those whose gender identity matches the sex assigned at birth-adolescent males are especially crucial to study given that they are disproportionately at risk for negative sexual health outcomes and that behavior formed during adolescence can determine risky sexual behavior during adulthood (Cordova, 2018). Parent-Child Sex Communication Four decades of parent-child sex communication research has identified various mechanisms that positively impact adolescent sexual health outcomes (Widman et al., 2016). Evidencebased interventions have shown that parents can be central to the sexual socialization of their heterosexual children (Sutton et al., 2014). When done effectively, sex communication can enhance youth's condom use self-efficacy, the ability to resist pressure to have sex, the initiation of conversations about HIV/STI prevention before sex, and access to reproductive and sexual health services (Sutton et al., 2014; Widman et al., 2016). While the interventions have been shown as effective, none of this research has been extended to sexual minority males who are most at risk for HIV infection. The role parents have in educating GBQ sons has received only minimal attention in the last few years (Flores & Barroso, 2017). Theoretical Framework Bronfenbrenner's bioecological theory provides a comprehensive framework to understanding the multiple factors of the larger ecological system that can influence sex communication at home (Bronfenbrenner & Morris, 2006). The bioecological theory posits that relations between an active individual and their active and multilevel ecology constitute the driving force of human development (Lerner, 2005). These multiple factors are the nested set of environments for which the bioecological theory is best known (Figure 1). This study explored how the microsystem (siblings, peers), mesosystem (school, religion), exosystem (politics, media), and macrosystem (cultural context) level factors interact and influence parent-child sex communication. Through these interactions, these proximal processes, individuals and their environment act on and shape each other, enabling individuals to situate themselves ...