In Fable 2, you have Good and Evil, but you also have Purity and Corruption. When corrupt, you looked pretty gross, and I recall there being persistent flies around the character (ew) that didn't always go away properly when purity was restored.

When pure, however, you were clean and sparkly. In theory, anyway. I definitely remember an issue with getting rid of those accursed flies.

And thus was one of the reasons I chose Susan for this parody adventure. Beyond just the general fun to be had with Susan in a setting like this, the idea of literal cleanliness being linked to one's moral purity was reason enough on its own for Susan to take the controller.