I'm happy to have new about you and read that you keep writing.
Even if you write story with very simple scenario, I would be interested to read them. Some authors manage to get quite good results by just writing what is in their mind at the moment they are typing probably not unlike a musician would do improvisation. From what you are saying, maybe you could start with some fetishes you like, then write a scene were some character are involved in some of those fetish gratuitously or for unfathomable reasons. Then either you leave it this way and call it a short story, or if you are really exited about it, you expand the original text, so that we get at least a vague idea about how the characters of the first scene ended up in this situation but also to prepare the ground for the next sex scene. My personal preference for this plan would also to have the sex scenes going further and further in their fetish. Except for the first one, as it's this one that will give you most of the motivation to keep writing and for the reader to keep reading, it may be ok to have this scene a bit more intense than the one(s) that come imediately after .