Conversation

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"Most communities" because those who don't care about the needy as much don't have the disposition to start a community in the first place
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Just communicate that you don't like hugs. Also you got arms to put between you and a hugger. If it's easy, don't ask society to solve your problem for you
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That's one where I've decided I'm in the wrong- signs of affection like that are important (and the hurt of rejection reasonably large), so what's gained with the imposition is more than what's lost on net.
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