“…Supporting the argument of Watson and Lubrano ( 2021 ), our findings indicate that, far from being a cost that is tolerated in exchange for having multiple partners oneself, partners’ other relationships can impact oneself in a number of positive and negative ways. On the positive side, we found evidence of CNM relationships supporting and enhancing each other (e.g., Bartell, 1970 ; de Visser & McDonald, 2007 ; Jenks, 1998 ; O’Byrne & Haines, 2021 ; Ramey, 1975 ; Rubel & Bogaert, 2015 ; Thouin-Savard, 2021 ; Watson, 1981 ; Wood et al, 2021a ), of enjoyable compersion as a result of partners’ other relationships (e.g., Deri, 2015 ; Ramey, 1975 ; Thouin-Savard, 2021 ; Wolfe, 2003 ), and of direct benefits that metamours can provide to each other (e.g., Bove, 2017 ; Ritchie & Barker, 2006 ; Sheff, 2014 ; Thouin-Savard, 2021 ; Watson & Lubrano, 2021 ). On the negative side, we found evidence of partners’ other relationships limiting or damaging one’s own (e.g., Cohen, 2015 ; Rubel & Bogaert, 2015 ; Rubinsky, 2018 ; Weitzman, 2006 ; Wolfe, 2003 ), of difficult feelings such as jealousy (e.g., de Visser & McDonald, 2007 ; McLean, 2004 ; Ramey, 1975 ; Rubinsky, 2018 ; Watson, 1981 ), and of ways in which relating to metamours can be difficult or painful (e.g., Deri, 2015 ; Rubinsky, 2018 ; Thouin-Savard, 2021 ).…”