In this commentary, I put forward some recommendations for a triangulating approach to the documentation of stigma marking consensually nonmonogamous (CNM) relationships. I also suggest what information policymakers need next: answers to the interrelated questions of where it comes from and what to do about it. Given the context-specific manifestations of social stigma, policy recommendations should be driven by both an account of the origins of this stigma and a consideration of the current atmosphere of intense social change relating to sexuality in the United States.