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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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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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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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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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Couples' personalities converge over time to make partners more and more similar.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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