I was chatting with a friend about how government officials now recommend that Americans don face masks in public to guard against the spread of the coronavirus.Since he was heading to a grocery store, I asked if he planned to wear one and he responded that he didn’t own one. Trying to be helpful, I suggested he find an old bandanna and tie it around his face, to which he said, “Nah.”I asked, “Why not?”“Because I’m a black man in America,” he responded.He was concerned, and justifiably so, about how employees might react at the sight of him, a larger-than-average black man, entering the store …