In 1766 Charles Macintosh was born in Scotland. He was a successful chemist and inventor, and in 1824 came up with a system for sealing rubber between 2 layers of fabric, making it waterproof. The fabric was used to make a range of coats and hats to protect people from the rain.
Rhinos always see this raincoat business as odd, since anybody could just go out naked. Nature has provided a waterproof skin already. Easy-peasy.
It’s sort of delightful how We can all can come up with Reasons for inexplicable decisions, right?