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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Speed dating was invented by a Rabbi in 1999.
45
The single biggest predictor of love is proximity.
30
Men who kiss their wives in the morning live five years longer than those who don't.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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