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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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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Parents receive 1 out of every 5 Valentines.
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40% of people who are rejected in romantic love slip into clinical depression.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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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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