Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Speed dating was invented by a Rabbi in 1999.
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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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One in five long-term love relationships began with one or both partners being involved with others.
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Kissing an infection-free partner is good for your teeth!
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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
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Two in five people in the world marry their first love.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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