Heads, faces, boobs, and arms are reported to be targets for those embarking on this, er, unique concept. Any routine noshing on a Katz's, Noah's (if you must), or Holey Bagel may become mentally difficult if any bagelhead is within eating (read: gagging) distance. According to www.thefrisky.com, the bagelheads "are injected by professional piercers in a specific location, which causes over-the-top inflammation and swelling. Then the area can be molded and dented in to their liking. Using food dye, you can even color your bump!" The bagelhead experience lasts for only one night, after the bagel bump loses shape and allows the skin to return to its normal shape. Oy.