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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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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The left ear is more responsive to words of love and emotion whispered into it than the right.
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Two in five people in the world marry their first love.
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Parents receive 1 out of every 5 Valentines.
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Men fall in love faster than women do.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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