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Slim Goodbody
Hair is not held in by muscles, but there are muscles that an erect a hair called the "arrector pili muscle".
Piloerector Muscle
mammory glands and hair
Piloerector Muscle
i assumed you are referring to the arrector pili muscle. usually when you are cold or scared, this muscle contracts, pulling the hair follicle in a upright position. the dents created are called goosebumps. it provides insulation and protects the hair
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yes
arrector pili muscle
tiny muscle fibers attached to each hair follicle, which contract to make the hairs stand on end, causing goose bumps.
Your finger, a dildo, a cucumber, a hair brush handle, and the anatomical opposite: a penis.
arrector pili