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yawnin

why do we yawn and why is it contagious


bec4022  Sat 22/11/08 21:36
1 to 4 of 4
yummymum
Sat 22/11/08
22:19
i dunno but as i looked at your post i started to yawn lol
puddicat
Sat 22/11/08
22:31
its primal!!!
lil75
Sun 23/11/08
10:20
We yawn to take more air in to try and keep the brain awake when were feeling tired, dunno why its contagious though!
firewatch
Sun 23/11/08
11:19
Yawning is also a sign of a lack oxygen, people who arestruggling to breath sometimes, but not all the time, yaw alot. God im yawning now!
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