Ewwwwwwwwww. Belly button fluff is siiiiiiick.

http://bodyodd.nbcnews.com/_news/2012/12/14/15197403-you-may-be-surprised-by-whats-living-in-your-navel?lite

http://jezebel.com/5968453/do-you-know-whats-living-in-your-belly-button