Holding it in longer is mentally retarding and I know some kids who like to hold it on till they nearly black out. Lack of oxygen equals death, temporary oxygen deprivation damages your brain, basic shit, right? These kids are dumb shits and make me out to look like a fool cause I don't believe it gets you any more high. I like oxygen, sorry. I like a few O2 hits with a hit to get all the vapors moving as so none is wasted and to keep oxygen in the blood. All it does is govern your mental capabilities and that's counter-productive against the future of the entire world.

For instance, the question, "Make you higher?" sounds like you have no idea about how you get high or even care. Not enough O2? Think of it this way, the vapors in the smoke get you high, holding it in cuts it off from any air, it just sits there and settles in your lungs. Cycle it around with some O2 hits, in with the good and should move the vapors to the appropriate places for absorption.

Really works for me, I don't even cough, maybe on occasion and I'm really high, I mean stupid high every time, but I compare how tobacco feels in the lungs and weed doesn't phase me, I feel it the same but my mental discipline is better.

Sorry, I'm kind of a dick, but I like to psychoanalyze things like this. Given only one life, better make it count, be smart and open minded. It's there you can really see everyone for who they are, what they are in this world, you'll see the patterns, and then you can make a wise decision on who you want to be.