Part of this work was funded by a grant awarded by Fundação para a Ciência e a Tecnologia to DLR (Ref.: 2020.00523.CEECIND). We want to thank the owners of Instagram pages (e.g., Beyond Monogamy; Rambóia Com Moderação; Polyamorous Awareness; Unapolygetically), the moderators of Facebook groups (e.g., Positive Polyamory; Polyamory and Open Relationships Discussion Worldwide), and Reddit Communities (r/polyfamilies, r/Swingers, r/OpenMarriage), for allowing us to share the link to our study and helping with data collection.