There is much more than meets the eye with the banana. A household favorite, a loss-leader at the grocery store, a metaphor for psychiatric problems, a mainstay of comic slap stick, the banana has woven itself deeply into human affairs, on both gut and mental levels. And this relationship is at least 10,000 years old, as far as conscious human cultivation of the species goes.
http://www.greenmedinfo.com/blog/7-ways-heal-bananas-evidence