“Topsy-turvy is the only order of the day—or night, as it happens—on the Eve of the Epiphany. My brother is not far wrong in seeing Twelfth Night as a threat to decency. For women are expected to dress as men, and men, as women. Children hold court at the Children’s Ball, with their parents as toad-eating subjects. Servants are permitted to sauce their masters. Grooms may kiss the Lady of the Manor—provided they present a sprig of mistletoe.”