The sound of pencils scratching on paper makes me cringe. My shoulders tense up and I feel like my ears actually hurt. Once I hear it, if it keeps going the sensation keeps getting worse and worse, kind of similar to how you get more and more ticklish, once those nerve endings are stimulated. This never used to come up, but John is "kind of a pencil person"; he even uses the old-school pencils you have to sharpen, which sound ten times scrapier than mechanical pencils. If the paper is particularly dry or rough (as in manila paper), again: ten times worse. And just thinking of the sound of an old, dry eraser scraping against paper, or a dry cloth being wiped across rough unfinished plywood, makes me want to crumple up and cry/die. Running fingers across dry paper or plywood is horrible too. I've got a bad case of the chills just writing this.
I just googled it and this particular kind of "misophonia" seems to be associated with autism/Asperger's. Weird.
Do you have any weird sensory aversions to very specific things? Last summer, during a game of Balderdash, I learned there's a word for a feeling of discomfort experienced while touching something fuzzy, like velvet, a peach or a tennis ball (haptodysphoria). What on earth would cause these things?