Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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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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40% of people who are rejected in romantic love slip into clinical depression.
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Raj from the Big Bang Theory is married to Miss India.
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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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