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Why Do We Do That? Clips

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  1. 'Having some form of decoration to the face and body is universal.'

    Duration: 01:07

  2. Why Doesn't Everyone Clear Up?

    Duration: 12:18

  3. Is procrastination just poor time management?

    Duration: 13:34

  4. "It helps you select a potential mating partner"

    Duration: 02:29

  5. Why do teenagers take more risks?

    Duration: 02:36

  6. Why does heartbreak physically hurt?

    Duration: 03:24