I disagree. Smoking meth a few times can cause you to develop spontaneous cravings for it (although I am not sure if I would consider them physical....it really is best compared to a nicotine craving. I don't know if even heavy use of meth will cause physical cravings though...that is the heroin route of addiction. With meth it is mental) , and apparently they don't go away much if at all over time. For me, the spontaneous cravings are sometimes intense even, but pass after a few minutes. And they are very rare. But I was by no means a heavy or even regular meth user. I smoked it about a dozen times and sniffed it once. I think smoked it is probably far more addictive, a lot of the craving is just for the feel of the smoke and the full process of melting it down and twisting the pipe and blowing out a huge ass cloud of smooth cool chemical smoke. for me I define a meth craving as a spontaneous thought about meth, with a strange sort of vivis/primal recall about the effects and process of smoking it in the past (remembering what it is like to feel the high, have the smoke in my lungs etc), and an almost subconcious desire / drive to repeat that process , despite my actual concious state not wanting to experience that drive / desire / 'sensory recall'