Supposedly the piercing is named after the porn star Madison whom was the first person to sport this piercing  Ive never seen any photographic data that backs that theory up and it may be an urban legend  I dont know anything about the individual Madison but given that these piercings have a high rate of rejection often leaving some really nasty scarring on the front of the neck if she had one it might be easy to tell from a decent photo of her neck  Since the rise of the piercing industry in the s new or experimental piercings tend to be named after the first individual bear them