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Boom. "Common sense should be questioned." Yawning may not be contagious. psypost.org/2017/06/study-suggests-yawning-may-not-contagious-49090
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…in reply to @axbom
More yawning studies: msn.com/en-us/health/medical/why-is-yawning-contagious/ar-BBCjyNC