Horripilation is goosebumps or bristling of hair. My cat is a walking horripilation. She lives, she horripilates.

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Horripilation is goosebumps or bristling of hair. My cat is a walking horripilation. She lives, she horripilates.
BATHROOM DANCE | JOKER OST | HILDUR GUÐNADÓTTIR 🎶 8D AUDIO 🎶 | USE HEADPHONES | HORRIPILATION
'Horripilation', 2020. Manipulated digital photography derived from an inking plate during photo transfer printmaking at Red Hot Press in Southampton UK. The 10th piece in my 'Inkling' series of images produced from within a creative process rather than as a result of said process.
Le musée de l'Acropole
Do Make Say Think: “Horripilation” — Wavelength @ The Danforth Music Hall
Horripilation
Also known as goosebumps or goose pimples, known as willies, the shivers, jimjams, and maybe the creeps, horripilation is per Merriam-Webster’s “a bristling of the hair of the head or body (as from disease, terror, or chilliness).” The M-W medical edition’s definition of piloerection (a near synonym of horripilation, piloerection refers specifically to hair-related willies) is a bit more expansive: “involuntary erection or bristling of hairs due to a sympathetic reflex usually triggered by cold, shock, or fright or due to a sympathomimetic agent.”
What neither definition mentions is that goosebumps can also be caused by pleasure—specifically aesthetic pleasure. Nor do the definitions mention that not everyone experiences aesthetic pleasure-driven goosebumps to the same extent, or even at all.