Walking barefoot in the rain! God (sorry, ma'am), it's wonderful! WHY DON'T MORE PEOPLE KNOW ABOUT THIS???
Rain is a perfectly good reason to go barefoot. If anyone asks why you are barefoot, just say your shoes and socks got wet and you had to take 'em off.
It's amazing how perfectly simple and obvious joys are frowned upon, dismissed, etc. Oh, wait...that includes sex, too. What was I thinking?