Group sex is an important health phenomenon, with an estimated one-in-ten people engaging in group sex at some point in their life. Group sex can be a source of pleasure and belonging but may increase risk of sexually transmitted infections (STIs). Despite its estimated prevalence, there has been little research on STI prevention and care among people who have group sex. Most group sex research has been done outside Canada and has focused only on men who have sex with men, excluding other sexualities and genders. My goal is to improve the STI outcomes for people who have group sex in Canada and beyond. My research focuses on 1) community-based knowledge around what makes group sex uniquely risky when it comes to STIs, 2) what STI prevention strategies people use during group sex and how effective they are, and 3) the barriers that healthcare providers face in providing STI care to people having group sex. Based on my findings, I will work closely with group sex community members to develop educational materials and support resources to improve STI prevention and care. Ultimately, I hope to reduce STIs and their negative impact on the health of this diverse stigmatized population.