Originally Posted by
Terminally Unique 
It is
normal to become addicted, a natural response. The body is doing what it is supposed to be doing in order to maintain
homeoestasis. The phenomenon has been replicated across cultures, and even across species.
I have a bachelors in biochemistry, so I know what homeostasis is, but thank you for the information.
However, addiction is
not a normal response to consumption of a substance. Not everyone who heavily consumes "addictive" substances.
Originally Posted by
Terminally Unique Precisely. The fact that the brain lights up with desire when someone sees a beer doesn't imply a pathology.
But neuroimaging can reliably distinguish psychopathology.