Quote Originally Posted by az666
I used to think that aswell...but then I was told by a few different people that the surface area of the lungs is so big all THC is absorbed almost instantly...so im going with the lack of oxygen thing aswell.

Maybe it's just a placebo
I don't think so. I mean, have you noticed that, even if you milked a hit, the longer you hold in a hit, the less you see coming out? That's because more THC was absorbed because you held it in longer.
Otherwise, no one would even have to hold in smoke, we'd all just exhale as soon as we inhaled. But we all know that you don't get as high that way.
Just my :twocents: