I legit would brush it on everything trying to get a better look to figure out wtf it was lol

ME IN MIDDLE SCHOOL: *BRUSHING ALL THE DANDRUFF ONTO MY DESK*; TEACHER: CAN YOU NOT DO THAT? ME: WHAT EVEN IS IT? TEACHER: IT'S CALLED DANDRUFF AND IT'S DISGUSTING; ME: THAT DIDN'T ANSWER MY QUESTION; TEACHER: THEN LOOK IT UP