Judith Neilson is a big believer in the restorative power of a bath. “Badedas!” she trills, shoving a mega-sized bottle of the potent German pine-bordering-on-bleach-scented bath soak under my nose. “Every night of my life I have a bubble bath. I’ve been using this for 50 years!”

We’re standing in the spectacular grey bathroom of the billionaire philanthropist’s recently renovated home in Freshwater, Sydney, and I’m trying to steer the conversation back to the magnificent, monolithic, speckled-marble bath in front of us. But Neilson has switched into curatorial mode.