YAWNING!

i've been yawning since just now!
guess i shall sleep early today!

why do people yawn?
interesting!!
a fren once told me this: because our brain does not have enough oxygen!
so by yawning, one will be able to take in alot of oxygen (because mouth open big big, air can enter)!!!
and i guess most of you realise that if you yawn, a fren sitting beside you may yawn too!
hahaha! its because when you yawn, you take in alot of oxygen from the surrounding and now its your fren's turn who does not have enough oxygen!

- if you happen to yawn 10times. you can go sleep already! (start counting!)

so moral of the story: yawning is contagious! dont sit beside someone who yawns alot!

:D