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It may be related to predisposition toward empathy. It is very contagious but common that even by reading about yawning can make you yawn! Ypu should google it, studies were made by many.
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Dot (woahthere) 2 years ago
Omg I actually did while reading this haha
When i yawn, my son started to yawn too, yup it is constagious, now we are sleepy
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Copyright © 2017 HubPages Inc. and respective owners.