In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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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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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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Wearing red increases attraction.
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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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