Psych Disorder

The one disorder I know most about is OCD just because I hear about it the most. I wonder if the disorder is born with a person or it is developed. You would think it is developed because it's all about the person's thoughts. I also wonder if OCD is related to a pre-game ritual at all. We brought it up in class, but to be quite honest I don't recall. It has symptoms of OCD, but you also think about if it's just a placebo effect. I also don't think OCD (Obsessive-compulsive disorder) is not an appropriate name for the disorder. I don't think the people that have this disorder are obsessed.  feel like it's more of a necessity to them than an obsession.