Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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When dragonflies mate, their tails form a love heart.
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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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In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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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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