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It's possibly the most natural thing in the world, but for many the naked human body remains a taboo. In Sydney, Australia, a coven of Wiccan witches perform rituals in the nude to express their truest form and bring themselves closer to the natural world. In America, some devout Christians worship together naked, believing that is the way God intended them to. And in central Japan, watch a centuries-old chaotic event called the Hadaka Matsuri: "The Festival of the Naked Man."