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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The single biggest predictor of love is proximity.
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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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In 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
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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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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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