Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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You burn 26 calories in a one minute kiss.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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The average person will go on a date at least 100 times before they finally marry.
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Parents receive 1 out of every 5 Valentines.
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