text: is it true that marihuana is a psychological addiction and not a physiological addiction? i am asking because a judge on tv claimed that marihuana isn't addictive, rather it is a paychological addiction. also, i am under the impression that a human being can create addiction to anything, it does not necessarily have to be a substance. marijuana is psychologically addictive. and no, it is not just weak minds that get addictive behaviors thrust upon them. we truly do not know all the factors. some say it is the lack of serotonin or the lack of serotonin receptor sites. no one seems sure.  what we do know is that very intelligent people can get addicted to many different things. yes, even to yahoo answers.  marijuana has no nicotine and does not seem to cause an increase in lung cancer (study just came out two weeks ago) however, other inhalation problems like chronic bronchitis may be associated with longterm use. i do know that people who are stoned all the time, and those who use tend to use most of their free time, seem not to accomplish much.  i doubt that i could write or do the photography that i do if i smoked dope. i certainly would lose my job. my clearance at a nuclear power plant demands me being clean and sober. if an accident were to occur, my job is to go out to the emergency center and calculate the release rate and advise folks on evacuation routes. not a job for someone doing ganja.  i know folks who drift along in life, quite happy as long as they can smoke some dope. i do not think they are bad or evil. they do not rob folks, they don't beat folks up. i have not even seen them get in car accidents. i wish them well.  they do spend a lot of time trying to get dope, though, and risk their wellbeing (and jail time) in getting it.   i try to stay clear of gambling halls, myself. *grin* i teach statistics. and yes, i play the stock market. *sigh*