“One day I had a bad cold, and I remarked to my teacher that I could not think how I had caught it. She looked at me with a frown and said: 'Have you washed your head?' I nodded. 'Certainly,' I said, 'I washed it two days ago.' She shook her finger vehemently at me. 'A singer never washes her head,' she said. 'She cleans it with tonic. She cleans it with a fine tooth comb. But she never washes it.'”

Emma Calve, 1922