I cant convince my little brother and his high school pals to not smoke pot-since i wont call the police on them-i’m trying to get them to at least improve their technique.
They will take a bonghit and then hold it in until the involuntary urge to breathe kicks in, claiming this gets them “higher” I say the increased buzz is simply oxygen deprivation, and that once you quit breathing in no more gas exchange is taking place, so its a pointless exercise. I heard that once-is it true?
Read the thread titled “Smoking the Straight Dope.” It should answer your questions.