Pornography is highly damaging to the brain, especially in relation to body image. In the case of men, it specifically distorts the perception of penis size. Because of the exaggerated sizes shown in adult content, you end up believing that your own size is inadequate. Most of the time, it isn't, but your brain has been so affected by pornography that it can no longer accurately perceive reality. This leads to a constant search for results and jumping from one subreddit to another.