Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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The average person will go on a date at least 100 times before they finally marry.
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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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Men fall in love faster than women do.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Kissing an infection-free partner is good for your teeth!
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