Truth be told, I have zero thoughts on adult colouring books. If someone finds them to be therapeutic, or relaxing, then fair play to them. I am not going to judge one way or the other (least of all considering that I still like to play with my model space ships every now and then!).
My wife, Polly, and our daughter with Down syndrome, love adult coloring books — especially the risqué ones. ❤️❤️
There is a certain appeal!