Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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You burn 26 calories in a one minute kiss.
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A man's beard grows fastest when he anticipates sex.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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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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Men fall in love faster than women do.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Men who kiss their wives in the morning live five years longer than those who don't.
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