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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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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The single biggest predictor of love is proximity.
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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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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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