Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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Couples' personalities converge over time to make partners more and more similar.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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The left ear is more responsive to words of love and emotion whispered into it than the right.
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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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The average person will go on a date at least 100 times before they finally marry.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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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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