Update to this post.

Over at LifeTwo.com, they are linking to a report that cleanliness may cause depression.

Dr. Chris Lowry of Bristol University (UK) looked into the mystery and concluded that the body’s immune response to the invading bacteria includes production of more serotonin. Serotonin aids in the transmission of messages in the brain, and low levels are linked to depression.

It was tested on mice and how did they know the little white critters were more happy?

They acted like Esther Williams and Johnny Weismuller.

If cleanliness is next to Godliness, then Dirt Devil is accurate?