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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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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
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