As a Sub, what is the one most painful thing that you absolutely dread that you secretly can't get enough of? (Substitute painful for the adjective of your choice if you wish)

I have an interest in what I consider minimalist bondage. Using the smallest amount of string, rubber bands, or tape to render the sub immobile or at least vulnerable in the most comfortable (at least at the tie points) (stress positions are still possible) and infuriating ways