Homonym: nipple (Bottle)
A nipple is a small, protruding structure found on the surface of the breast in mammals, including humans. It serves as the outlet for milk during breastfeeding, allowing infants to receive nourishment. Nipples are surrounded by a darker area of skin called the areola, which can vary in size and color among individuals.
In addition to their role in lactation, nipples have sensory functions due to the presence of nerve endings. They can respond to touch, temperature, and other stimuli, contributing to sexual arousal and intimacy. The anatomy of nipples can differ significantly between genders and individuals, influenced by factors such as genetics and hormonal changes.