Compersion
"The cult of non-monogamy is built on a promise that the chaos of the human heart can be rationalised away: that jealousy can be transformed into happiness for your partner, that the right combination of words can bring everyone’s desires into alignment. It is, in its most doctrinaire forms, no less of a Santa Claus belief system than traditional marriage, and at least as amenable to exploitation by the sexually unscrupulous."
-Sarah Ditum