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This is a tokoloshe statue. A tokoloshe, in Swazi folklore, is a small dwarf that visits you at night and robs you of your sexual potency by giving you wet dreams. He can also be a bearer of good news as it means you're going through puberty.
If you want the tokoloshe to go away, you simply put bricks under your bed posts to raise it up so that it's too high up for him to get to you.