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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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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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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40% of people who are rejected in romantic love slip into clinical depression.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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