Just got back from Costco. I was the only one not wearing a mask. Dude at the door got all excited and gestured toward me and before he could utter a syllable I said "I have a medical condition which prevents me wearing a mask". He backed off and I never missed a step. I got a couple of OMG looks once inside. I never touched my face the entire time but everybody else was fiddling with their masks and whatnot. Crazy times we are living in.