Hey Telfer.
I seem to be having difficulty making my point clearly here. I'll try once more.
To begin with, you made a statement about certain things not having any real benefit (things that aren't going to help them...), including doing a crossword, eating a chocolate chip cookie, and having an orgasm. I gave the benefits, and how they actually can help, other than the orgasm... I kinda hoped you could see the benefit of that yourself. But for your benefit, it aids the propulgation of the species, it increases the chances of getting pregnant, and it makes the entire thing that much better! These all help in many ways, none of which are related to martial arts, but that was not part of your context. That gets back to what I was saying earlier.
You state that you make a distinction between pleasure and happiness, and between happiness and proficiency... okay, but what does that have to do with my answers? You say that a crossword doesn't help someone, I gave examples of ways it does, and you seem to ignore that completely? Same goes for the other examples. So I'm not really seeing your point.
Now, I didn't say you couldn't get an answer (correct or otherwise) without context, what I said was that it wouldn't be of use to you without context. You have shown a number of times here that you are rather inexperienced and ignorant of Japanese Swordsmanship (again, that is not a bad thing, and asking questions of something you don't know about is definately encouraged), so asking specifics is not something that will help, as you don't have the requisite knowledge to really understand the answers.
For example, you commented that you feel a reason the Japanese sword "continues to be made with only one sharp edge..." is because of the blocking options. No, that is backwards. The sword was designed with a new construction method, and the construction method resulted in the classic curve, which occurs due to the differential quenching and different levels of carbon in the different steels used (this is very basic, but enough). The differential hardening "pulls" the sword into it's curved shape, it is not formed that way initially. The curve allows a single sharpened edge (there are variations, such as the Kogarasu Maru), so the reinforced blocking methodology is a result of the sword, the sword is not a result of the methodology.
You also speak of Kuroda's lack of facial expression as unusual. It's not. That is the way classical martial artists train. It's an expression of a concept called Mushin, and again shows your lack of knowledge in this area. Again, not a bad thing, but should give you an indication that you have a little way to go before asking more technical questions.
At the top of this page, you reference a review of Dave's book. It states quite clearly that his instructions are not considered accurate by Yagyu methodologies, and then you say "What he describes here is exactly as Lowry explains it...pinky curled under and index finger extended", which seems to give the impression that you missed the point of the reviewer as well.
When it comes to the origin story of Katori Shinto Ryu, that is far from uncommon. Schools such as Kashima Shinryu, Takagi Yoshin Ryu, Shindo Muso Ryu, and many more have similar "divine inspiration" at their origins. Take such stories as metaphors for serious training, usually in seclusion or at a Temple. Philosophical influnce is very common as well, and pervades many different aspects of life, including aspects of yours right now.
So basically (and I know I'm repeating myself here), if you want to know about Japanese Swordsmanship, start at the beginning. Jumping to the end won't give you anything you can really use.
To other posts...
Kaizasosei, my friend. Not exactly. A wider grip was favoured by swords used on the battlefield precisely because it gives greater power and leverage to be used against armour. The right hand provides direction, but the left hand provides power, and the further apart they are, the more power you can generate. This is one major reason that the grip has the hands separated in the first place. To get to the "ultimate" in grips, look to the Nodachi or Nagamaki (which realistically is closer to a very long handled sword than a naginata). So for the strongest cuts, a wider grip is needed. A shorter one assists in single hand use, and allows for shorter actions.