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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Raj from the Big Bang Theory is married to Miss India.
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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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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Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
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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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Speed dating was invented by a Rabbi in 1999.
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