: Nipples are highly sensitive erogenous zones packed with nerve endings. Arousal or cold temperatures can cause them to become erect, though they often "have a mind of their own" and may not always react predictably.
: Common variations include protruding, flat (level with the areola), or inverted (tucking inward). real mature nipples
Nipples come in a wide range of shapes, sizes, and colors, all of which are considered normal. : Nipples are highly sensitive erogenous zones packed