In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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The average person will go on a date at least 100 times before they finally marry.
33
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Two in five people in the world marry their first love.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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40% of people who are rejected in romantic love slip into clinical depression.
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