I disagree, my experience is that if you hold in your hits, you do in fact get higher. I've smoked by breathing normally, and i've smoked by holding my hits in for about 15 seconds. I got much higher on the Latter, and surely I know the differents between oxygen deprivation and being high. I have been smoking for over 10 years.

Also, that theory does not explain why the age old activity of hotboxing in your car gets somebody who isn't smoking high. Or how shotgunning a hit to somebody who isn't smoking gets them high aswell. Surely oxygen deprivation doesn't last 3 hours and gives you the munchies.

Daily factoid isn't going to do it for me, there are plenty of myths about smoking marijuana that many believe is true.