Perhaps, you could first take a look at your approach. Could it just be that your partner is overwhelmed with the onslaught of things you would like to try because you introduce what you’re already interested in in its entirety? By that I mean that if you are trying to have anal sex, did you first broach trying anal fingering or analingus? Think about what your end goals are and then consider introducing some of them in smaller increments to lessen the shock factor. After all, it's your fantasy - you’re already ready and used to the idea. Even if you have tried discussing it with your partner before, they may still feel overwhelmed and reject it without really hearing it. This is the same as the things that you want done to you; introduce them in smaller steps.
Also, let your partner know what this means to you and really listen to their responses/answers. Obviously, you place a specific value on sex in the relationship. Do you and your partner share that value? How is your current sex life? Are you both enjoying the sex you are having? Do you both feel safe enough to explore some of these experiences together, or are there barriers to the exploration that maybe you’re unaware of? Your partner may have very good reasons for not wanting to partake in some of these flavors, whether it is fear or prior bad experiences or even just a lack of understanding of what it is you want. As I tell all of my clients, talking about it is always the first and most important step. I cannot promise it will work, but it usually helps.
