Yes,Kumaresh is known for his rare sense of humor and has built up formidable reputation in this area,But Where is he today???

i dont think anyone can yawn while sleeping, maybe they can while in shallow sleep

A long-standing hypothesis is that yawning is caused by an excess of carbon dioxide and lack of oxygen in the blood. The brain stem detects this and triggers the yawn reflex. The mouth stretches wide and the lungs inhale deeply, bringing oxygen into the lungs and hence to the bloodstream. It is almost certain however, that this hypothesis is not correct. A more recent hypothesis is that yawning is used for regulation of body temperature. Another hypothesis is that yawns are caused by the same chemicals (neurotransmitters) in the brain that affect emotions, mood, appetite and other phenomena. These chemicals include serotonin, dopamine, glutamic acid and nitric oxide. As more of these compounds are activated in the brain, the frequency of yawning increases. Conversely, a greater presence in the brain of opiate neurotransmitters such as endorphins, reduces the frequency of yawning. Patients taking the serotonin reuptake inhibitor Paxil (Paroxetine HCl) have been observed yawning abnormally often.

Good discussion going on, friends. Thanks sajeetharan for your information. :) .I yawn only when i open my text books.

Great relief to know that the first one is wrong!! A good one from you!

but i have found yawning contagious over phone too.. i mean .. i feel like yawning as soon as i hear the person on the other end yawn..

Oh my God! Never ever enter into any such yawning competition!!!

OMG!! Such a long winding explanation Sajeetharan!! Yaaawwwwwwnnnnnnnnnnnnn!!!

I can see Kumaresh online today but he is not entering any discussions?? I wonder why???? or is he sitting logged in and yawning??? :dry: :huh: :blink: :silly: :lol: :unsure: :laugh: :woohoo: :woohoo:

Thanks friends for your great response on this deeply serious issue( :silly: ). Now we all can do Ph.D in yawning!! :woohoo:

Let me add one point to this yawning wisdom!! :S

According to Me:
Yawning is one and only the great process which makes a husband open his mouth boldly and vigorously while in any other conditions he is not getting chance to open his mouth in front of his wife. And wife can not control it by any means. :dry: :dry:
:laugh: :laugh: :woohoo: :woohoo:

That is so true Kumaresh!! I can vouch for that!! :laugh: :laugh: :laugh:

I am sure your wife too will!! but don't let her see this otherwise you are in for some serious whacking!!! :lol: :lol: :lol: :woohoo: :woohoo: