When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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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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40% of people who are rejected in romantic love slip into clinical depression.
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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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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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