Will, emotion, and desire trigger bio-chemical reactions which in turn motivate behavior. To end the desire for behavior, one must end the thought that triggers the desire. There is always an origin of every thought. Similar thoughts become linked in the neurological pathways of the brain. Clustered thoughts become beliefs.
Beliefs are powerful engines that drive autonomic and automatic behavior.
When the fuel of desire is added to belief, automatic behavior becomes addictive behavior. Addiction is a disease. The only doctor who can cure this disease is you. By talking, you can heal the desire for your addiction. That is, if you talk about the thoughts creating the desire.