I belonged to a writer's group and we gave ourselves an assignment to write on a topic that we personally are opposed to and work on making it believable to the reader. I found the exercising rather freeing.

See, fantasy is just that--out of the real world and in the safety of our imaginations. Since that time, I've written things in my stories where there is no such things as safe sex, no consent and even the issue of sanity is pretty iffy. Use your fiction as a place to play with your dominant side and pain and every other possible thing that makes you go squik. Just because you dream it, doesn't mean that it is going to come true or even that you want to experience it.

If you are concerned how it will taken by others, put a disclaimer on the work. Here's the one I use on those sorts of tales:
The following is a work of fiction. This story is not real and should not be used as anything but fuel for fantasies. The author in no way, form, or fashion condones the (whatever the story is about). Consent is an essential element for any sex act and, while this story depicts otherwise, it is just a story. If you are too young or too stupid to understand the difference between fantasy and reality, you certainly shouldn't be reading this tale.

Good luck in finding your voice.