Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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In 1999, a fisherman found a love letter in a bottle from a soldier in WWI. He returned said letter to the now deceased widows 86 year old daughter.
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Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
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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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Couples' personalities converge over time to make partners more and more similar.
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Men fall in love faster than women do.
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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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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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