We go to movies that make us cry, scream or gag we poke at sores, eat spicy foods and run marathons. Some of us even seek out discomfort and humiliation for sexual gratification. Most of these activities are painful yet many of us find pleasure within them and Professor Paul Bloom of Yale University's recent book, The Sweet Spot, seeks to suss out why. Bloom joins writer and broadcaster Linda Yueh to discuss how pain can be a compelling draw for some and so repellent for many others.

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