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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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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40% of people who are rejected in romantic love slip into clinical depression.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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