When dragonflies mate, their tails form a love heart.
22
'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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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
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
40% of people who are rejected in romantic love slip into clinical depression.
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