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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Historically, sweat has been an active ingredient in perfume and love potions.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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The average person will go on a date at least 100 times before they finally marry.
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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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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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