Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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The average person will go on a date at least 100 times before they finally marry.
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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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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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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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One in five long-term love relationships began with one or both partners being involved with others.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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