Oral stimulation of nipples is a human sexual practice. Typically, one person will orally stimulate the nipples of another person. The stimulator may lick, suck, or bite the other person's nipples. The practice may be performed upon – or by – people of any sex or gender. Some people are able to perform oral stimulation upon their own nipples. Oral stimulation of nipples can be a form of foreplay. Some females experience breast orgasm without other forms of sexual stimulation.
A related, but far less common sexual practice is erotic lactation. Erotic lactation involves deriving sexual stimulus from interaction with or consumption of breast milk, often through adult breastfeeding.
Another sexual act consists in a woman licking or sucking her own nipples so as to stimulate the partner by this vision when it is considered to be erotic.