When dragonflies mate, their tails form a love heart.
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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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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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The single biggest predictor of love is proximity.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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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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