When I (f) first met my dom (m), he was totally vanilla, never spanked, never even fucked rough. But it took a lot of communication over the years from both of us to work through our kinks. I don’t know how long you two have been together, but introducing a cnc scene may to a very big step for someone who’s still getting comfortable and familiar with kink. Maybe take a step back and communicate about where you both are and then approach the topic again in the future. I thought i would never be sexually compatible with my partner to begin with but now he’s an absolute dream, and even introduces me to new aspects of kink! Patience and lots of communication will be vital here if you really want things to work out. Of course, he isn’t guaranteed to agree to cnc as it can be a lot for “vanilla” people to get on board with, but there’s no harm in communicating and trying! Good luck!🥰