It looks so simple: a length of twisted cotton glides across the face, grazing the upper lip, eyebrows, and hairline. This is threading, an ancient hair-removal art with roots in India and the Middle East. Masters of this art, M&M Thread Salon’s staff members quickly ensnare bristles in their threads, creating lines as sharp and clean as the battle ax that chops soap into bar form. The treatment is particularly beneficial for people with sensitive skin, as it uproots hair without chemicals or harmful products.