Compergion - What Is It?

Compergion describes specifically taking non-sexual pleasure in your partner's joy that they experience with another person. This feeling is distinctly different from something like voyeurism, which is taking sexual pleasure in observing someone. Compergion was coined by the Karista commune sometime in the 1970s or early 80s. It's also distinct from cuck-holding, which, god, why does this have to be such a gendered heteronormative term?