Compersion
Updated:Compersion is an emotion characterized by feelings of joy, happiness, and pleasure when witnessing one's partner experiencing joy, happiness, and pleasure with another romantic or sexual partner. It is often described as the opposite of jealousy. Compersion is most commonly associated with polyamorous relationships, but can be experienced in any type of open or non-monogamous relationship dynamic.
Additional Information
Compersion involves empathizing with a partner's happiness even if it is caused by another love or relationship. It stems from a secure sense of self and a philosophy of abundance (rather than possessiveness or scarcity). The term was coined in the polyamorous community. While often challenging, some consider the ability to feel compersion a relationship ideal to strive for.
Examples
Feeling excited and happy for a partner when they get a chance to explore a new relationship or sexual connection
Celebrating a metamour's role in a partner's life and the joy they bring them, rather than feeling threatened