Let's pretend you are living on a deserted island and that you've already taken care of your most pressing needs. You have lots of clean drinking water while fruit and seafood are plentiful. Unfortunately, the goats and chickens you rescued disappeared and flew the coop. You forage by day, but at night you sleep fitfully, under a moonlit, tropical landscape. You have explored every square inch of your domain; but thanks to some unexpected flotsam, you can still shave every day. It's been at least a dozen years since your boat took on water and sank without a trace....