I agree with Jinn

You may get lucky and find some who will write the story for you, but nobody knows exactly the story that you have in your mind.

So please have a go, and share the story. I'm sure most writers on this site would agree that to writing BDSM stories helps can help you develop writing skills (such as spelling and grammar) that you could use later in other ways.

It's fun once you get started as well!