I've heard the one about the ps and qs before. Doesn't make it true just because I have heard it before but it makes sense. I love these stories. One saying that we've used is "poor as piss" or piss-poor not having a pot to piss in or a window to throw it out of. It seems that this goes back to families peeing in the same pot and selling the pee to the tannery where it was used to tan the animal hides.
Keep 'em coming Kate.