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