Why do human have appendices?

[Richmond Mathewson]

  On 21/04/2010 19:26, Mark Swindell wrote:
> I recently read that there may be a value to the appendix... it may be a breeding place for helpful bacteria to repopulate the gut after it's been decimated of its normal stock. Here's a link.
>
> http://www.livescience.com/health/090824-appendix-evolution.html
>
> Mark
>
Some people, either willingly, or unknowingly, are
avoiding my simile. . .   :)

I wonder why?