Why is someone else's yawn so contagious? Once you see a person yawn, sometimes you want to yawn yourself. Sometimes just reading or thinking about yawning is enough. There is no single explanation for this yet. Investigate the role of attention, imitation and social connections. But if a person doesn't yawn back, it doesn't prove anything about their character or ability to empathize. I already wanted to yawn - I'm holding out for now as a psychoanalyst.