Nipples: Anatomy, Sensitivity, Lactation, and Sexual Function
Nipples are sensitive structures on the breasts or chest that may respond to touch and arousal and allow milk to pass during lactation.
Nipple: Meaning, Anatomy, Sensitivity, Lactation, and Sexuality
A nipple is the projecting structure at the center of the areola and may function in lactation, physical sensation, sexual pleasure, and body expression.