casually mentioning your plurality to someone and that your partner is plural, and that you're poly, and then they say So are you actually polyamorous or is it all in your head.
This is pluralphobia and polyamphobia.

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casually mentioning your plurality to someone and that your partner is plural, and that you're poly, and then they say So are you actually polyamorous or is it all in your head.
This is pluralphobia and polyamphobia.