One of the many wonderful things about having a tolerant dog like Joey is that for the most part, nothing seems to bother him. He doesn't fuss if you come near him while he is eating, he doesn't mind doing just about anything for you. Anything, that is, with the exception of being groomed. He just isn't sure if he is quite ready to accept being groomed. This one still makes him pretty nervous. But if you are willing to put in the extra work and time, you should soon find Joey bringing you his brush for his next grooming session.
Many dogs who are considered tolerant tend to be quite calm and relaxed by nature. The one thing that probably offers cause for concern as far as Joey is concerned, is the various tools you plan to use during the grooming session. On top of this, Joey is of the firm belief that he does a perfectly good job of cleaning himself, but the reality is that he doesn't do as good a job as he thinks he does.
No matter how tolerant Joey happens to be, when it comes to being groomed, he is likely to be a little skittish at first. Be sure you give him plenty of time to get used to the tools and plenty of treats along the way. Before long the two of you will be having fun and bonding together while you make him look his best.