40% of people who are rejected in romantic love slip into clinical depression.
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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.
27
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
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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One in five long-term love relationships began with one or both partners being involved with others.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81