I did a week as a volunteer at the Durham Book Festival some years ago. Bear with me, this will become relevant soon. One of my jobs was being in charge of the roving mic for an evening with Dennis Skinner ( I love the man - I know he's not your taste @peteblue) It was a brilliant night.At one point he talked about his Mum who was always singing when she did her household chores when he was a child. Years later his Mum developed dementia and was in a nursing home. She didn't recognise anybody. Dennis decided to sing one of the songs she used to sing to her. To his amazement she joined in with him, remembering all the words. That became the pattern of his visits with her. They would sing together. It was a truly beautiful story.