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Nipple:
The dark tissue in the center of the areola of each breast in women and men that can stand erect when stimulated by touch or cold. In a woman's breast, the nipple may release milk that is produced by the breast.

Necrophilia:
Sexual attraction to or sexual contact with dead bodies.

Normophilia:
Sexual preferences that are considered common or "normal" according to social norms.

Norplant®:
A contraceptive system of six small soft capsules containing a hormone that is inserted under the skin of the upper arm. Available only by prescription.

Nude:
Completely without clothes; naked

Nymphomania:
The desire by a woman or man to have sex very frequently with many different partners.