When dragonflies mate, their tails form a love heart.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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Parents receive 1 out of every 5 Valentines.
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40% of people who are rejected in romantic love slip into clinical depression.
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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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Men who kiss their wives in the morning live five years longer than those who don't.
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