Most people dont understand how much smoke you inhale with a cig and how much you inhale from a hit. Lets see well a cig is a roll full of tobacco and you inhale how many times during the whole time and blow out how much smoke? Where as 1 hit from a piece of glass is enough and its only a small tube of smoke.
Thats really not enough to be damaging to your lungs. And only if you smoke everyday without giving your lungs a little bit of time to heal every once in a while then you'll be fine.
EDIT:"Fortunately, even cases of life-long or otherwise long term smokers, human lung tissue begins the process of healing itself when smoking is ceased."
This mostly applys to tobacco since it REALLY damages the lungs but its the same with weed and even the long-term effects on your memory after smoking for a while stop as soon as the weeds completely out of your system, (30+ days.)
There really are no downsides to smoking once or twice or even 3 times a week so long as you can control it, and everyonce in a while take a break.
Last edited by TheReturn; 09-29-2010 at 10:25 AM.