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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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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Sea otters hold hands while sleeping so they don’t drift away from each other.
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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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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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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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