Belly button is the most popular body part for piercing. No other piercing marks the modern American piercing scene like the navel piercing. Why pierce belly button? You can get two completely different answers from an anthropologist or from an angry parent. But if you ask the average person considering the belly button rings or other navel jewelry, you will probably hear that it is just plain sexy. Fashion designers know it. No wonder that low-rider jeans hit the runways as models felt the urge to accessorize their bellies. The spark of jewelry on a bare midriff just so softly hints at something more going on...