Sea otters hold hands while sleeping so they don’t drift away from each other.
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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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
You burn 26 calories in a one minute kiss.
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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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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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