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.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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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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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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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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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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Raj from the Big Bang Theory is married to Miss India.
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