I still find blackboard + chalk to be a heinous combination. Is this just because my grade school used cheap low-grade chalk?
I do have a weird physiological reaction to 'fffffffff' friction sounds. A hard cheap pencil against cheap paper, making a similar raspy sound as chalk-on-blackboard, with cause me to reflexively (and uncontrollably) suck my lips in tight, as if protecting my teeth from the vibrations. Back in school, after a long homework assignment, my lips would get swollen from doing this. It doesn't happen with pen, doesn't happen with smooth pencils or soft paper. Apparently I'm not the only one with this weird thing.
I do have a weird physiological reaction to 'fffffffff' friction sounds. A hard cheap pencil against cheap paper, making a similar raspy sound as chalk-on-blackboard, with cause me to reflexively (and uncontrollably) suck my lips in tight, as if protecting my teeth from the vibrations. Back in school, after a long homework assignment, my lips would get swollen from doing this. It doesn't happen with pen, doesn't happen with smooth pencils or soft paper. Apparently I'm not the only one with this weird thing.