Medical: Explanation for clean hippies.

"Obsessive-Compulsive Disorder (OCD) is a medical brain disorder that causes problems in information processing. It is not your fault or the result of a "weak" or unstable personality." - from the article below

With treatment, most people achieve meaningful and long-term symptom relief and some are completely cured. However, OCD "tends to be underdiagnosed and undertreated for a number of reasons. People with OCD may be secretive about their symptoms or lack insight about their illness. On average, people with OCD spend over 9 years seeking treatment before they receive a correct diagnosis and 17 years for them to obtain appropriate treatment." - from the article below

Obsession --> Compulsion
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Contamination fears of germs, dirt, etc. --> Washing
Imagining losing control or aggressive urges --> Checking
Forbidden thoughts --> Ordering/arranging
A need to have things "just so" --> Hoarding or saving

Learn more--> Obsessive Compulsive Foundation