I'm guessing it's my face, maybe I have a clueless look about me! I am a quiet person which I think sometimes leads people to think I'm a bit dim but so often it happens in circumstances where I haven't said a word
for instance a stranger approaching me in a museum to ask if I was lost
(I think I was just looking up a a Greek frieze).
It happened again today, at my weekly supermarket shop I had a voucher that wouldn't scan so asked for assistance (the scanner on that particular till didn't work, but she acted like I should've known that 🤷♀️). Anyway she then proceeded to explain that the other set of self service tills can also be used for scan as you shop..fair enough I thanked her for letting me know, now I know I can use them when the shop is busy. However she then explains again, the exact same thing three more times and on the third time physically walking over to the till and explaining very slowly to ignore the screen on the self service checkout and just scan the barcode whilst covering the screen with her hands
. It was really busy and I was just stood there politely trying to leave and she kept explaining 😭.
I mean I'm no professor but I wouldn't consider myself particularly unintelligent, I must just look it 
Anyone else?