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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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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40% of people who are rejected in romantic love slip into clinical depression.
72
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
You burn 26 calories in a one minute kiss.
605
For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
41