why do humans kiss, hug, hold hands or love to come in touch with other humans?

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why do humans kiss, hug, hold hands or love to come in touch with other humans?

In: Biology
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First, this isn’t just humans but most mammals (and frankly a lot of other animals) that enjoy physical contact. I’m not aware of the neural chemistry behind it, but essentially it takes a lot of trust to make physical contact with another living thing. Sustained contact means you’re probably with a trusted ally and therefore safer than if you were alone. Humans are pack animals; we evolved to work together and have friends.