All i got was a bunch of guesses and conjecture from lay people. The belly button pate post (
http://www.medhelp.org/personal_pages/user/1334611) should have been screened out. This will be the first and last time I use this unprofeesional web site.
Tried belly button pate? Nice on toast :)
The bellybutton was where the embilical cord was, a feeding tube to your body, thats why its so deep! The smell is fluids from the body , yes smelly, and you've always had it just didn't notice until now. It is not because your over weight it just is.