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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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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The average person will go on a date at least 100 times before they finally marry.
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Wearing red increases attraction.
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Speed dating was invented by a Rabbi in 1999.
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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Couples' personalities converge over time to make partners more and more similar.
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