Banana

The banana is sometimes referred to as "the atheist's worst nightmare," due to its near-perfection at being a fruit designed to be eaten by humans. As such, it is commonly used as an example to support arguments that human intelligent design is a legitimate pursuit, and being a moron is not.

Design
Humans began intelligently designing the banana since the Agricultural Revolution over 6000 years ago (thus it is about as old as the universe, give or take a few giga-annum). Human cultivators began with the wild banana which is an overly-large, dense, unwieldy fruit that was inedible unless well-cooked. Humans used their Intelligence to Design the perfect fruit we know and love today. This validated the theory of Intelligent Design, which says that things like skyscrapers and Mount Rushmore had to have intelligent, non-random causes. However, some scientists believe that God created wild bananas to be inedible as they used to be, in spite of the overwhelming evidence that bananas were in fact intelligently designed by humans instead of stupidly created.

Selective breeding
The banana is perfect because of many features that were intelligently designed simultaneously through selective breeding techniques, as the intelligent designers guided natural selection through generations by only letting bananas with desirable traits survive into the next generation. Such traits are seen in modern bananas, and include


 * An ergonomic shape that allows for easy gripping and peeling from either end, with unobstructed access to a firm yet easily-chewable gooey center.


 * An aerodynamic shape that allows for throwing at intruders, often used as a sidearm in times of war. Aboriginal Australians, inspired by this design, further intelligently designed it into various types of boomerang.

Sex
A coitonomic shape with natural oils that allow for self-lubrication and easy insertion into several orifices during various sexual activities. Particular attention may have been given during the Intelligent Design process toward those activities involving masturbation and homosexuality or Heterosexuality.

You've never inserted a banana into any orifice? Come off it. Most of us have inserted bananas into our mouths.

Nutrition
Bananas are a good source of potassium. It has electrolytes!