The average person had about 67 species of bacteria crawling around in there.
#3 A Handful Of Mammals Have No Belly Button At All!
#4 If You’re A Male, Older, Hairy, And Have An “Innie”, You May Be More Likely To Have Lint In Your Belly Button
#5 Someone Actually Holds The Guinness World Record For The Largest Lint Collection
#6 Some People Used To Gaze At Their Navels As A Form Of Meditation
#7 “Omphaloskepsis”
#8 Belly Button Fetishes Are A Real Thing
#9 Belly Button Cheese?!
#10 Earth's Belly Button
Source: http://bowwowhd.me/4771497-14027341