It can be discouraging for the addict to try to stop on their own. Usually a pornography addict will go a few weeks without viewing, and suddenly goes back to it as heavily as before, if not more so.
Pornography addiction is becoming much more prevalent, including with teenagers, as access to pornography become easier due to the proliferation of pornographic websites. An addiction doesn't happen overnight. With time and effective counseling, the proper coping skills can be developed, and recovery is possible.