[voice over] Just like we need food and water, humans need each other. A brain study revealed that, when placed in an MRI,a patient's reward center lit up when another person sat in the room. Neurons fire when we talk to someone, think about someone,and they go haywire when we hold someone's hand. Our brains and bodies are actually programmed to seek each other out and connect. So, then why do so many people prefer being alone?
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