Nipples.
In the event that you wish to have jewelry for body piercing on your nipples, you may want to make them larger. With patience and serenity can be safely run large punctures, the structure allows for a nipple. Of course you should be careful, because the proliferation of cells can lead to a miscible seal tissues to their displacement, and even rejection. Proceed carefully and slowly.
Genitals.
Usually genital piercings convenient to expand and to do. These places have increased blood supply, because these features are delayed wound is surprisingly fast. This applies particularly to Prince Alberts and Labia. Of course remember to listen to your body.