I really appreciate your thoughts on this. You brought a lot to think about to the table. I can appreciate hope hard it can be to stop such a soothing habit, something one has been doing for years. From a physical health stand point you are right, sucking on your thumb in later year can cause issues to develop with teeth and the mouth. At the same time, mentally the habit is so soothing in the moment that those issues seem so far in the future, making it really hard to quit. I imagine that cage was not fun at all. I like the idea of hugging a pillow much better.