Yawning.....

Just finished a good yawn and now i'm ready to write this post. Ever notice how a good one is really satisfying? And when you don't have a good yawn it's very unsatisfying? Ever wonder why you yawn? I always thought that it was because my brain wasn't getting enough oxygen. Apparently not says this article by Eric H. Chudler, Ph. D.

There is some interesting information there. Any questions you have about yawning are answered, except one: why do we yawn? From what I understand, nobody seems to have figured it out. There are some theories, but nothing has been proved.

But here is the question I have for all of you: do you think yawning is contagious?