Speed dating was invented by a Rabbi in 1999.
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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 in their lifetime will spend an estimated 20,160 minutes kissing!
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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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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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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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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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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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