I took about 5 years to get my feet under me and know what exactly I wanted. Some people take decades to achieve that, some people only take months. What I'm saying is there is no real time frame set for any person to figure out what they want out of this, if anything at all.
What does that mean for your relationship? It means that your Dom could want this, but just not what he wants out of it. Or that he may be a kinky vanilla person who enjoys some occasional spice in the bedroom but not much more.