Tommy Chreene with his horse, Lady, at home in Meaux, La. Chreene spent 26 years working on offshore oil rigs in the Gulf of Mexico. While working on the Ursa project, he was part of a program designed to get the workers to open up emotionally with one another. Edmund D. Fountain for NPR hide caption

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Emotion seemed to fuel plenty of sighs by Humphrey Bogart's character Rick (right) in the 1942 film classic Casablanca, and even Rick's good friend Sam, played by actor Dooley Wilson, couldn't console him. Archive Photos/Getty Images hide caption

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Joy (left, voiced by Amy Poehler) and Sadness (voiced by Phyllis Smith) catch a ride on the Train of Thought in Pixar's Inside Out. The movie opens in theaters nationwide June 19. Disney/Pixar hide caption

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Science Of Sadness And Joy: 'Inside Out' Gets Childhood Emotions Right

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A direct, friendly gaze seems to help cement the bond of affection between people and their pooches. Dan Perez/Flickr hide caption

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Scientists Probe Puppy Love

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Tylenol Might Dull Emotional Pain, Too

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