I knew that! Why spend money on research? Ask me next time.
This article in Science Digest seems to paint it in a slightly negative tone.
Marijuana use dampens brain's response to reward over time, study finds
To put it in a positive light -
Dampening response to material rewards is actually good. That is what they say you need to do to reach "enlightenment".
Want people want and like always change, and even when they get it, they are not satisfied. Why? Cognitive dissonance. How to remedy it?
