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These are not rules. These are instincts and bio-social mechanisms. Thanks to them we survived and evolve. One should have respect for them.

• Graffur 6y ago
  Simply: no.
  • aristofun 6y ago
    Okay, a guy from internet knows better than hundreds of authors :)
    • Graffur 6y ago
      Don't make me invoke Godwin's law :)
      • aristofun 6y ago
        But what exactly “no”? No, we there’s no mechanisms behind reciprocal smiles for instance? Or no, they don’t play role in our survival? Or no, we shouldn’t respect them?