Hobbit Feet

One of the most noticeable features of the Hobbits is their bare feet. I think Tolkien chose to do this as a way to show their innocence. We mentioned in class about how child-like the Hobbits are the lack of shoes remind me of how kids will tend to walk around without them as well. Does anyone have any other theories on why Tolkien chose to have the Hobbits not to wear shoes?