We yawn because We yawn because we need to get rid of CO2, so that would mean if you don't yawn you will eventually die from hypercapnia (too much CO2)!
They yawn for the same reason that you do, too much carbon dioxide in the body. Yawning is the body's was of releasing the excess gases.
Yawning is the body's tendency to get oxygen as fast as possible if your breathing does not supply your body enough. If you yawn too much, it means you are not getting enough oxygen through inhaling. Better consult a doctor for that. (:
No, dogs do yawn too. I hope some other animals also yawn.
Pass gas, Talk too much, Burp, Kiss, Swear, Yawn
Because you are forcing yourself and thinking about it. You yawn because it happens randomly when you don't think about it. But if you think about it too hard, your body thinks it needs privacy if u know what i mean.
Sorry? Could you at least specify your answer? -BTW- I can yawn actually. I'm sure you can too.
They probably just woke up. People yawn when they wake up too.
Same thing as when you yawn..... When you get tired you get a shortness of breath causing you to yawn...you yawn to catch your breath when your tired...
When you yawn it doesn't mean your sleepy. Even scientists don't know why you yawn.
It means to yawn.
because your sleepy too.