I'm defintly rationlizing it but I also feel like I'm arguing with someone over whether or not steroids are cheating. Of all the recerational drugs out there (booze and tobacco included) pot is one of the least harmful. I can understand how "waking and baking" might disrupt "tha lifestyle" but in my case I do it when I can spare the cash and almost only at night.
Whenever I read this argument on any message board there's always a horde of lifters who'll go on about how negatively it effects their performance without any shred of evidence other than blurbs that could have come out of a HS health teacher. Just like all the people who moan whenever Jay Cutler posts a picture on facebook - "HE DONE TOOK MAGIC PILLS AND CHEATED!" - all seemingly having followed the advice of media sensationalizists.
I don't believe that lack of oxygen statement. I've suffered from asthma since childhood and I also commute by bicycle everywhere. I'm one of those jackasses on a brakeless fixed gear dodging traffic. I also don't wheeze going up hills. Yes, I know - good for me.
Some people are actually trying to make asthma a case of medicinal marijuana.
Here's a random article I found via Google. Case closed! :D
http://www.cannabismd.net/asthma/