Musk notes in perfume used to be processed from the actual musk glands of animals to impart a gamey, warm, and sensual texture.  But this practice is illegal in modern times, and nowadays musk notes in fragrance are entirely synthetic. Musk’s tangy aroma can range from sheer, metallic and bright to very animalic and even as intimate as the scent of warm, damp, human skin.  Musk adds a sultry, sensual feel to demure feminine scents, as well as making masculine notes like tobacco and leather vividly expressive in cologne. For perfume fans who enjoy the alluring scent of warm, clean, skin - musk is a must-have note in fragrance.