omg I got hit with something. it's the thought of knowing demons can change their wing form however they want (Beelzebub one is fly wings, Satan's is bat wings) but Crowley chooses to keep the feathery angelic one, just in different colour. I bet some demon that got to know his wing form would sneer at him because to them feathery wings are a symbol of the past and of the angel bastards they don't have fond memories of. he keeps them anyway.