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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One in five long-term love relationships began with one or both partners being involved with others.
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A man is more likely to get a woman's phone number if he is accompanied by a dog.
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Yawns are more contagious among people with closer relationships.
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Women who play video games tend to have more sex and be happier with their relationships than those who don’t.
18
According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14