Tuesday, October 26, 2010
Theory #1: We yawn because our blood needs more oxygen, or at least that's what people used to think. But now scientists have proved that this theory is probably mostly wrong.
Theory #2: We need to stretch our muscles, and we can do this while we are yawning. If our muscles are all stretched, then we are ready to spring into action. And this might be one reason why we yawn if we are nervous, because we think we might have to jump up and run away at any moment.
Theory #3: Yawning is a way of cooling off the brain or even the whole body.
Theory #5: People yawn because they feel empathy for other people.
Anyway, these are just some theories, and some of them might be true, and some might be false. I am just telling you what I read about why we yawn. And I have made the theories simple and easy to understand by leaving out lots of details, but if you like details, you can go to Wikipedia and do a search for "yawn," and read them all there.
Or another way you can use yawning is if you are in obedience class, and your person is trying to get you to do something, but you don't understand, and you are feeling nervous. Then you can yawn to try to feel calmer and also to tell your person that you are nervous and confused.
Sometimes just thinking about yawning will make you start yawning, which is kind of what is happening to me right now. So I'm going to stop writing and go take a nap!