quote:

Originally posted by tubularbills biggest contribution is thought that yawning is a sign that your brain is low on oxygen. not deadly low or anything like that, but low enough that it says, "hey asshole, breathe in and gimme some O2"

yes I've heard this too. Sounds more logical than the feeling tired/bored argument. So if you have to yawn... yawn mofos!

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quote:

Originally posted by Theresa It's theorized that it's the brains defense mechanism. A yawn is caused by the lack of oxygen reaching the brain (usually caused by shallow breathing when tired). However, this can also happen if you are suffocating as well. So when you see someone yawn, your brain receives a signal that tells it that someone within your vicinity is not getting enough oxygen, and as protection, it incites you to yawn to be sure that you have enough yourself. P.S. Sorry if someone already posted that. I didn't have time to read the whole thread.

yeah, we already knew all that

i srsly yawned right after opening this thread

i cant yawn anymore... i smoke too much

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quote:

Originally posted by denys envy and when jennypie yawns that just means she is ready to try to fit another dick in her mouth.

fix't

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