Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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One in five long-term love relationships began with one or both partners being involved with others.
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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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40% of people who are rejected in romantic love slip into clinical depression.
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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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The average person will go on a date at least 100 times before they finally marry.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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