It’s interesting to think of a human face as a signalling device, but it’s kinda multipurpose. This link to a study on gender perception and emotion.
Angry face 8-[
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Settler words&music in S'ólh Téméxw, (leanpub.com/upsun) living where privilege meets precarity in MST country. she/her/they———– Novels: Midnite Moving Co., Upsun; Sweep Off Those Waves coming soon, Hair Sinister after that. —Restore All Indigenous Lands!