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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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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Sea otters hold hands while sleeping so they don’t drift away from each other.
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As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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In 1999, a fisherman found a love letter in a bottle from a soldier in WWI. He returned said letter to the now deceased widows 86 year old daughter.
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Historically, sweat has been an active ingredient in perfume and love potions.
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