Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
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When dragonflies mate, their tails form a love heart.
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Some British police cars carry a teddy bear to console children after an accident.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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