Uh I have equated craving to a little green monster that lives in my brain. If he doesn't get the drugs he wants he goes nuts. he starts beating on the inside of your brain and chewing on your neurons. Ripping out things like common sense, your future, your self-worth, your dignity...whatever if it doesn't get fed enough.
Just chewing and chewing...in this case saying "meth, meth, meth, meth."
It doesn't matter even if I do feed him. I can only afford a quarter of a gram. By the 2nd hit the pounding and screaming stops...only to return when the pipe is empty.
Damn it all to hell. A quarter of a gram is just enough to make you want more!