No, I'm not gonna. Mats and Rice don't built up a tolerance.
and ...
According to the U.S. Institute of Medicine (IOM), when examining drug addiction, tolerance, dependence, and withdrawal are the characteristics most often assessed to determine whether or not an addiction is indicated. Although some users of marijuana may experience slight tolerance, dependence, or withdrawal associated with use, the IOM argues that this is not evidence that marijuana is addictive. The organization asserts that tolerance and dependence are normal physiological adaptations to repeated use of any substance, including prescription drugs. Safe, appropriate use of many prescribed medications -- for pain, anxiety, hypertension, etc. -- routinely produces some level of tolerance and a slight physiological dependence that is addressed through dosage and may lead to withdrawal symptoms if stopped abruptly, rather than gradually.
The IOM also reported that observable symptoms attributed to marijuana withdrawal are rare and were only identifiable in "unique patient settings... limited to adolescents in treatment facilities for substance abuse problems, and in a research setting where subjects were given marijuana or THC daily." Compared to the withdrawal associated with alcohol or heroin, the marijuana-related symptoms of restlessness, irritability, and sleep disruption are minor. According to reports, the symptoms are not "severe enough to re-initiate use of cannabis." The criteria of tolerance, dependence, and withdrawal, therefore, do not indicate marijuana addiction, assert proponents of marijuana legalization.
http://www.kqed.org/topics/news/pers...juana/1no.html