Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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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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Two in five people in the world marry their first love.
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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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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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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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