A few summers ago, my grandmother saw me look twice at a dress in a department store and made me try it on. It was dusty blue and sleeveless. Its high neck fastened with a button above an open back. One sash wrapped halfway round the waist; one emerged as if by magic from a slit. I tied them in a bow against my hip. From the waist to just below the knee, generous folds of fabric flowed. When I walked, they swished against my skin. I didn’t want to take it off. Last summer, I wore that dress so often that I joked it was my ‘summer uniform’…