Addition involves conscious choice, powerful desires and impulses and attempts at self-control. Theories of addiction stems from many disciplines, such as sociology, psychology, biology, biopsychology, economic theories and more. Some theories have taken the part of the problem and provide justification within the part of the problem. They neglect key parts of other theories. However, theories should be incremental science. People listen to music, which can be very pleasurable. A theory of addiction should able to explain why these pleasurable, functional and self-medicating behavior are not addictive while gambling, smoking and drinking alcohol are.