Asked in Yawning
Yawning

Why do we get the urge to stretch when we yawn and while your at it why do we yawn thanks guys?

Answer

Wiki User
08/21/2013

yawns are contagious becuase when we see another person yawn our brain sees it as that person is gasping for air and they dont have enough oxygen so as a defense mechenisme we will yawn also.