“…Swinging refers to when a couple practices extradyadic sex with members of another couple, typically at the same time within a shared social setting (Denfeld, 1974;Gilmartin, 1974;Jenks, 1998;Varni, 1974). Open relationships are relationships in which partners explicitly agree that they can have extradyadic sex; studies on open relationships often focus on sexually open marriages among opposite-sex couples (e.g., Buunk, 1980;Knapp, 1976;Rubin & Adams, 1986;Rubin, 1982;Watson, 1981), or gay open relationships (e.g., Blasband & Peplau, 1985;Kurdek, 1988;Kurdek & Schmitt, 1986). 2 The definition of polyamory is more contentious (see Klesse, 2006); however, a broad, inclusive definition of polyamory is the practice of, belief in, or willingness to engage in multiple romantic and=or sexual relationships with the consent of everyone involved (Easton & Hardy, 2009;Taormino, 2008).…”