QUOTE(Edunpanna @ Jun 12 2007, 11:35 PM)
What do you think the significance of the urine is?
The urine "personalizes" the work.
My theory on why urine, especially, is because you can get a lot of it to boil. Any "personal" body fluiids such as menstrual blood, semen, vaginal fluid, saliva, blood, etc.--well, how often can you get a mason jar full of those other fluids?--hmmm? A jar full of urine is the fastest, easiest and surest collection of a "personal" body fluid.
For those who don't care for handling body fluids, the "earthy" or "musky" scented herbs (vetiver, patchouli, and even sandalwood) can be used as substitutes.