When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
456
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
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Wearing red increases attraction.
30
Couples' personalities converge over time to make partners more and more similar.
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