'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.
255
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
Speed dating was invented by a Rabbi in 1999.
45
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
40% of people who are rejected in romantic love slip into clinical depression.
72
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44