The Coward's Guide to Body Piercing by Herbert I. Kavet and Martin Riskin is a humorous must have for anyone interested in body piercing. It helps you to answer your friends when they ask 'Why did you do that', and provides a light hearted overview of the cultural phenomenon. If you do not have a copy of this book, I have to ask Why Not?
body pirecing
Navels could be hot and ticklish. The reality is that not everybody goes in there with soap, baby oil and Q-Tips. Belly button Diversity project researchers welcome the grime, as your belly button bacteria tells a tale. It's a true story about divergent progression, and it's a page-turner. I found this here: New belly button bacteria furthers study of evolution