There are five chapters to this story. Each chapter more irritating than the previous. If at any time, you find the experience to be grating, immediately give up. There is no point in walking this road if you have no reason to walk it.
If for some reason you determine that the discomfort you are experiencing is actually advantageous to your particular disposition, then proceed cautiously. Only you will know if you are of the sort which holds the desire, which is a very particular desire, to seek out the procedure to succumb to a filthy witch.