What makes us
Our bodies cause us to yawn to draw in oxygen and remove a build-up of carbon
dioxide. People do tend to yawn when sleepy. The truth is we don’t know why we
yawn. Yawning is triggered in some area of the brain still not discovered. We
don’t know why yawning seems to be contagious. Cats, dogs, other mammals, and
fish yawn, leading some to believe yawning is a form of communication. What we
know for sure is yawning is subject to the power of suggestion. So, if you feel
the need to yawn, pass it on!