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
Couples' personalities converge over time to make partners more and more similar.
235
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Kissing an infection-free partner is good for your teeth!
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Historically, sweat has been an active ingredient in perfume and love potions.
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Parents receive 1 out of every 5 Valentines.
20