Originally Posted by Arnox

The concept of something being 'invented' on the human body is a pretty silly notion: natural/sexual selection is the only mechanism at play when it comes to things having a purpose or function.

There's no evidence to suggest that there is a selective process at work regarding the ability for foreign objects to be inserted into the anal passage in humans. That is to say that there is little reason to believe that the asshole is 'intended' for cocks, dildos or fruit. Its function is to remove waste from the body so that food and drink can be consumed for nutritional elements.