Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Two in five people in the world marry their first love.
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You burn 26 calories in a one minute kiss.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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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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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 couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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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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