My mum once told me the story of how, during the early years of her marriage, a friend of her friend had expressed concern over her “apparent” childless state. My mum’s friend had stared at her with a mixture of shock and amusement. “She has three kids already,” she announced to this individual. It was their turn to be surprised; they had had no inkling that my mum had even one kid, let alone three. They had been so certain of their impression that if the new information wasn’t from one who was so close to my mum, they would have doubted it was true.