The shape of your belly button says things about your personality
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The shallow navel:

Your shallow navel illustrates a mysterious dimension of your personality. You’re the type who knows how to keep a secret, without ever giving in to the advances of others to discover it. Moreover, you’re extremely suspicious of others and only trust your closest and most loyal friends. With you, trust is earned.
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The protruding navel:

If you have a prominent belly button, you are the type with a strong personality. You are very stubborn and believe you are always right. Furthermore, you love being in the spotlight to attract attention because you know your true worth and don’t doubt your abilities. However, this poses problems for you in love because you have a hard time finding someone who can match your expectations.