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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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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You burn 26 calories in a one minute kiss.
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Parents receive 1 out of every 5 Valentines.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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