Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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Some British police cars carry a teddy bear to console children after an accident.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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A zoo in China gave a gay penguin couple the opportunity to raise a chick.
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