40% of people who are rejected in romantic love slip into clinical depression.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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One in five long-term love relationships began with one or both partners being involved with others.
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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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Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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