Small bumps or sebaceous oil glands that form around the dark part of the nipples after puberty. Even though their purpose is to aid in nursing, both men and women have Montgomery Nodes because they are formed in utero before sexual differentiation occurs. They help lubricate the nipples and keep germs away from them. They can become especially prominent when a woman is pregnant, or when a woman or man feels a chill or is sexually aroused. While the average person has approximately nine Montgomery Nodes per nipple, some have almost forty and others have none.