Often a term used among polyamorous (openly nonmonogamous) people. Often called the antonym of jealousy. Seeing your partner/s get a crush on, hook up with, fall in love with, or in any other way romantically bond with other people, and feeling deep happiness, joy, and love for them.
"You're in love with Parker, don't you feel jealous that he's started dating Emily?"
"Actually, no, I feel compersion. She's really cool. He lights up to see her. When I see him that happy, I actually feel happy for him, not jealous."
Taking pleasure or joy in the action of your partner engaging in a similar romantic or sexual relationship with another person.
See also polyamory
The opposite of jealousy is compersion.
The act of living vicariously though one of your own girl/boyfriends because they chose to abandon you and spend quality-time with someone else. It is widely believed "compersion" is a self-preservation technique developed by individuals that self-identify as polyamorous.
Jack has developed a keen sense of compersion to maintain his sanity after his girlfriend Jill, went to shag her other boyfriend John.
A feeling of joy when a loved one invests in and takes pleasure from another romantic or sexual relationship.
Commentary: Compersion can be thought of as the opposite of "jealousy;" it is a positive emotional reaction to a loved one's other relationship. The term was coined by the Kerista Commune. It differs from candaulism in that compersion does not specifically refer to joy regarding the sexual activity of one's partner, but refers instead to joy at the relationship with another romantic and/or sexual partner. It is analagous to the feeling of joy a parent feels when their children marry or that best friends feel for each other when they are happy in a romantic relationship.
I feel compersion when I see my husband come home happy from spending time with his girlfriend. His happiness brings me happiness
Love your lover's lover for they too love your lover
Love is multiplicative, compersion in nature. Love in its whole is much greater than the sum of the discrete pairings.
"Compersion" is the secondhand feeling of happiness you get when you see someone else happy.
I feel compersion when I see a toddler happy; I don't know if I love her, but I do indeed feel compersion for her.
A tendecy to become aroused instead of jealous when one's partner has sex with another person or a third partner; also the person having such interest.
He has a compersive reaction to seeing his wife getting laid.