"In 1977, Ruth Hall felt there was ‘little evidence to support Stones’ belief that the vaginal pessary [diaphragm] would stretch vaginal walls’. Yet diaphragms came in sizes ranging from 5 to 9 centimetres in diameter and there was no consensus as to whether the use of larger sizes was more or less uncomfortable for users. As vaginas vary in size, the larger sizes must have stretched the vaginal walls and, in some women, pressed on the bladder or otherwise caused discomfort. This is another example of the willingness to see the vagina as inactive."