Nipples
Nipples are among the sensitive and often erogenous body areas in all genders. Their shape, size, and color can vary greatly from person to person. In BDSM, nipples can be part of touch, sensation play, display, or sexual stimulation, while sensitivity and response differ individually.
Anatomically, nipples are connected to the areola and often respond clearly to touch, cold, or other stimuli. They can become erect, which is caused by muscle reactions in the tissue and is not the same as genital erection. These responses are normal and may occur spontaneously or through external stimulation.
With any form of stimulation, the rule is: start gently, observe responses, and respect limits. Pulling, pinching, sucking, or other more intense stimuli can feel pleasurable, but they can also cause pain or injury if done too strongly. Caution is especially important with piercings or sensitive skin.