" She suspected that was the cause of most suspicion, people’s worry that monogamy could easily be vanquished by a solitary example of something else that was working just fine.

People weren’t exactly eager to admit it, but it did seem that a lot of them implicitly viewed monogamy as particularly fragile, and a lot of people did seem to nurse a private worry that the only thing keeping monogamy going was a lack of competing alternative relationship styles – ones that were considered to be viable or healthy in any event.

As a result, they were prone to viewing a non-monogamous setup with suspicion, not only more conflicted than they might have otherwise been but also largely unaware of those conflicts. "

― Page Turner , Psychic City (Psychic State Book 1)