polyamory
noun [ U ] uk/ˌpɒl.iˈæm.ər.i/ us/ˌpɑː.liˈæm.ɚ.i/
多性伴行为
the practice of having sexual or romantic relationships with two or more people at the same time
For him, polyamory is more honest and natural than monogamy. 在他看来，多性伴行为比一夫一妻更诚实、更自然。
Compare: polygamyfree love