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The post likely performed well due to its provocative and unusual statement, which sparks curiosity and encourages engagement through comments and shares. The use of simple, bold text and emojis makes it easily digestible and shareable on the platform.

The post presents a humorous and slightly bizarre fact about the human body, stating that a belly button is essentially an old mouth. It uses text overlays on a dark background with some abstract decorative elements and emojis to convey this statement.