Hair Pulling/Cutting

Hair is not alive, it's protein. So, cutting it won't hurt (just as cutting your nails don't hurt). Pulling it, however, will.

Hair follicles fold down from the epidermis into the dermis and occasionally into the hypodermis. The deep end of a hair follicle is expanded, forming a hair bulb, which is surrounded by a knot of sensory nerve endings called a hair follicle
receptor, or root hair plexus. The wall of a hair follicle is composed of an outer connective tissue root sheath, a thickened basement membrane called a glossy membrane, and an inner epithelial root sheath. Associated with each hair follicle is a bundle of smooth muscle cells called an arrector pili muscle.