I've implemented a pitch system based on a C-minor harmonic scale, where the highest pitch represents the cock out of the mouth, and the lowest pitch is balls deep. It takes a bit of practice to get used to the tones, but I've been able to complete a session without looking at the screen at all. This is particularly helpful as there are now different positions as well, and some of them are indeed quite difficult to do while looking at the screen. Of course, you can also just ignore the suggested positions if you prefer.In terms of story, the theme/tone is one of the things that is still being finalized - but regardless of what I decide on, you can avoid it completely with the custom mode.
