Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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Wearing red increases attraction.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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Historically, sweat has been an active ingredient in perfume and love potions.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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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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