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Why Do People Yawn

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john1066 | 18:52 Fri 18th Oct 2013 | Health & Fitness
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What causes people to yawn and why do we open our mouths so wide? We don't draw any extra air in so why do we do it? Strange innit!!xx
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I think we do draw in extra air. Most of the time we breathe really shallow breaths and sometimes our body needs more oxygen.
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Thanks Tilly, sounds about right...x
...and we yawn because other people do. Yawns are very infectious
Here is a link to a very interesting article on Wikipedia:

http://en.wikipedia.org/wiki/Yawning
LOL J9, talk about contagion, I yawned as I read that article!!!
Some people yawn when they are anxious.
Don't know why, but they do.
I'm told I yawn when I'm on the phone !
Haven't stopped yawning since I read the original post ! !
Animals yawn as well.
Boredom, tiredness
and heat.
Boxtops I'm glad its not just me.I tend to agree with Lee Evans that the reason yawning is contagious is because there is only one yawn in the world and we have to keep it going lol

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