serial monogamy
noun/ˌsɪəriəl məˈnɒɡəmi/
/ˌsɪriəl məˈnɑːɡəmi/
[uncountable]- the fact or custom of having more than one husband, wife or sexual partner in your life, but only one at a time
- Some research suggests that serial monogamy is good for men but bad for women.
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serial monogamy