Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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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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The average person will go on a date at least 100 times before they finally marry.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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Couples' personalities converge over time to make partners more and more similar.
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Speed dating was invented by a Rabbi in 1999.
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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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