Obsession was another concept in Chapter 9 that differed from the Avoidance Theory. Obsession would be someone obsessing over if they turned their flat iron off so they checked it five times in a row. Obsession is a factor in Obsessive Compulsive Disorder. I have slight OCD in a way that I never have handed a college assignment in late and I obsess over deadlines. It was cool to learn about these concepts and compare/contrast them from everyday life.