Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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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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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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One in five long-term love relationships began with one or both partners being involved with others.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13