The perforation of the nipple to apply jewelry has been practiced by various native people throughout history. The earliest accounts of nipple piercing in western culture date back to the 14th century. Years later, during the Victorian period around 1890, the fashion evolved again. It became popular to apply Anneux De Sein, small diamond rings or gold chains, to the nipples. Before this trend was popularised, it was mainly practiced by the upper class.
As for the type of nipple jewelry you are to choose, you have to consider several points here. First of all women’s nipples are larger and are subject to being rubbed by bras all the time. Women are recommended to use thicker jewelry than men (12g – for women, 14g – for men). Neither men nor women are advised to wear thinner jewelry simply because it might grow out or tear. Professionals advise to wear Nipple Barbells instead of Nipple Rings as they make the healing process quicker and put less pressure on your nipples.