It would be intrested to base an entire form of writting over that idea. (or at least throw it up for disscusion in a Bleach Community.). Though now I REALLY have to wonder if it's like HDM where the sword/daemons represent your sexual organs (don't tell me that they don't 'cause they soooo did!) and in that case you could SO over-analiyze the fact that Zaraki never named his sword. It would be like a grown up who's daemon could still change form.