Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Wearing red increases attraction.
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The average person will go on a date at least 100 times before they finally marry.
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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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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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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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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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Speed dating was invented by a Rabbi in 1999.
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