“…Scholars have increasingly noted the diffi culty of individual-level HIV prevention interventions, and called for research that examines the social, relational and structural contexts of people's lives that sustain risk behavior or promote optimal health behaviors (Beyrer et al, 2012 ;Huebner, Mandic, Mackaronis, Beougher, & Hoff, 2012 ). As a large proportion of HIV risk behavior occurs within the context of a primary romantic relationship (Davidovich et al, 2001 ;Dolcini, Coates, Catania, Kegeles, & Hauck, 1995 ;Marin, Tschann, Gomez, & Kegeles, 1993 ;McCoy & Inciardi, 1993 ;Reilly & Woo, 2004 ;Sullivan, Salazar, Buchbinder, & Sanchez, 2009 ;Weinhardt et al, 2004 ), researchers have sought to examine how relationship dynamics contribute to risk behaviors, both within and outside the primary partnership among same-sex male couples Mitchell, Harvey, Champeau, & Seal, 2012 ;Prestage et al, 2008 ).…”