9. Puerto Rico

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Unfortunately for the people of this tropical island nation, this cure is one of those that you know isn’t going to do a thing to help. In this case, the idea is to prevent the hangover from ever happening, and if nothing else, it’s certainly sounds like a unique idea. Before drinking, a person is supposed to cut a lemon or a lime and rub it on the armpit of their drinking arm. Other than making you smell all citrus-y fresh, this is pretty much guaranteed to fail when it comes to preventing hangovers.