OK, this is only slightly off topic, but close! We used to have a veeerrrry old cat who was so deaf he couldn’t hear anything at all. Some of you may know that when cats get old they often stop grooming themselves and he was looking pretty ragged. He was sitting on the bed while my wife was vacuuming the bedroom and my wife just started vacuuming him to see how much loose fur she could get off him. He loved it. Couldn’t get enough of it! All because he wasn’t scared by the sound of the vacuum. Duffy’s gone to the big catnip patch in the sky now but he looks gooood.