I was walking near a park around the neighborhood and encountered a cat. It approached me, meowed, laid on the ground and stretched in front of me and I continued walking without petting it.
However I was curious about its tail- as it walks, its tail lines up against its back (pictured in my masterpiece below)
When it laid on the ground its tail did move around but once it got back up its tail went back to "sticking" against its back:
Why is the cat's tail doing that? I found a helpful diagram on Google but I didn't find what I was looking for.