Are you "Possessed"?

http://www.mindhacks.com/blog/2008/03/possessed_.html

Compulsive hoarding is often linked to obsessive-compulsive disorder, where affected people experience intrusive thoughts or urges to complete certain actions (most commonly 'washing' or 'checking') even though they know how seriously these intrusions are affecting their lives...MORE

Link to Martin Hampton's documentary Possessed (via MeFi).