It appears that it all has to do with the sacrosanct sacral nerve (in your nether region) and having it electrically stimulated once you are a goner. Your brain will not feel a thing so it is a bit of a waste.
I did a quick scan. Looks good to me, though I might take some umbrage to #4. Consistent orgasms via manual, i.e., digital, stimulation. I am great believer and advocate of that technique to get the ball (so to speak) rolling.