Dressing up cats is one of the more disgusting habits of young humans, usually females. It's uncomfortable, and it goes against the dignity of any decent cat. It's feline humiliation at its worst.
Cats hate hats.
Now adult scientists are doing it and I am not sure whether to give it my approval or not. They have started crocheting little hats for cats, so that they can measure brain activity.
Demeaning? Yes. Should be stopped? Purrhaps not. The aim is to measure feline brain activity so as to learn more about chronic pain.
Many of us older cats have severe arthritis. Our dumb human companions often don't notice this. We hide our pain and do not complain. Unlike them... have you ever heard two oldie humans swapping stories about their health? Pathetic.
So the aim of these hats is to benefit cats, not humans -- for a change. And although the cats in the Youtube report (https://www.youtube.com/watch?v=jLyRnnprR-M) look very fed up with their hats, maybe their disgust is justified by the benefits that may result.
And, of course, this is non-invasive research. No cat is hurt in the process. Just made to feel very very undignified. What do other felines think?