Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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When dragonflies mate, their tails form a love heart.
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When cats are happy, they may squeeze their eyes shut.
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Dolphins have names for one another.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
The desire to squeeze and hug cute things comes from the same place in your brain as aggression.
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