After reading the quite entertaining book Devil in the Details: Scenes from an Obsessive Girlhood, I have been looking up information on OCD (sometimes linked with anotherr FP interest, hoarding and garbage houses). I stumbled across a fascinating bit of research that suggests a genetic cause of OCD and related disorders! Yes, I sometimes miss the news for months on end, but you’d think I would have heard about this. More on OCD from Medline Plus.