Yes, that helps. I don't get the sense though that when people are playing pinch harmonics, they are aiming for specific notes, like you might if you are playing tap harmonics for example. Without any frets up there, where you're pinching and picking (sounds like an old Hee Haw routine), it seems like it would be difficult to figure out where to touch the string with your thumb, and it just doesn't appear, from the videos I've seen, that people are moving their thumb into different positions as if they are aiming for specific notes. The fretting fingers are jumping around to different frets, but the position of the other hand seems to remain pretty stationary. And yet, it still sounds good. Is this because the pinch harmonic is most liklely going to have some familiar relationship to the note you're fretting (3rd, 5th, m7th) rather than being something that would sound way out of key (like a tritone or m2nd) and also because the actual pitch of the pinch harmonic is generally secondary to it's general coolness (for lack of a better word) in terms of what it adds to a passage?