I’ve published only one story on this site, although I have three in various states of incubation. Having read MCStories for many years as well as this site (and Malebots as well), to me, there are two main “formats” of stories - the single episode and the series. For the stories themselves, the author chooses either the narrative or the sexual activity as the point. We all love the sexuality of these stories, but my bias is that I think a well-told story is often more satisfying than a written sex scene.
Series are challenging to construct; the majority of authors take one of two forms: 1) the story is a long concatenation of episodes; or 2) the story is more organic, a large-scale complex idea that could not fit in a single episode. Most authors use option 1, a concatenation of episodes. Examples are Sinister Intentions or even Bargain which is a single story through which the characters go through various stages. Very few authors choose option 2. At the moment I can think only of the author M.Greene, who has clearly planned out his entire story from the start. You can tell because his complex narratives are like Dickens or Tolstoy - multiple threads are constantly weaving in an out of one another. You can not construct such a story in a concatenated method but must have it all planned from the start. (I don’t all all wish to disparage in any way, but the story Re-Educator showed the danger of the concatenation method. Without adhering to the entire story’s outline, the original focus and point of the story is lost, leaving the reader frustrated.)
For single-episode stories, either you focus on the sexual activity or the narrative. A good example of how to use a sex scene in a story is provided by a the construction of a film like Hitchcock’s Psycho. Marion Crane’s murder is the most violent thing in the film, and no subsequent event in the film comes close to replicating that. However, the effect of her murder leaves the viewer tense for the rest of the entire film. You should treat sex similarly. You should have a single sex scene that reaches the apogee, and let it be the shining beacon of your story. Once you try to duplicate that within the same story, you diminish the effect of the primary sex scene. I recall reading one story (can’t remember the name) in which a character engaged in sex at least three times. By the third time the author had lost my interest. It was boring.
Sex can be very boring. It’s the characters that make all the difference. A good example is the recently posted fourth installment of Phil and Tom, called Phil and Tom’s Date. In previous episodes you had a detailed description of the unusual sexual encounter that happened to the characters. You know this, and you start reading Phil and Tom’s Date with that expectation. But Fiddlebear uses this chapter to paint a more detailed picture of the encounter. They’re not sure that each other knows that the other is gay, so it’s a long emotional exploration (just think of times you were young, unsure of yourself, and you wanted to get closer to someone, but not so quickly that you’d repel them). So when the sex comes, it’s made all the more powerful, NOT because of the verbal description of sex (although that is very satisfying in itself), but because the author has made you invest your own emotions in these characters.
There’s another site that includes mind control stories (on that site lots of the authors have Asian names). I remember reading one story in which a guy has an encounter with another guy, told mostly in metaphysical terms. No dicks or asses, just things like joining the spirit, feeling his presence, souls intertwining with one another, etc. At the end of the story the narrator snaps out of it and realizes there’s no other guy, and that it was just his yearning to overcome loneliness that prompted his fantasizing (which seemed so real). That was a well-written story, but the point is that it was so affecting even though it didn’t involve explicit sex. I love the series Pollination. But other than the initial description of sticking your dick in the flower, there is absolutely no sex (again, the Psycho technique of letting one explicit episode carry the reader through subsequent narrative).
If you’re starting out or need inspiration, as others have suggested, start with your fetish (presumably mind control), perhaps combined with another fetish. Ok, mind control - what about will turn you on? Permanent, or return to normalcy? Sinister or “coming to a new understanding of existence”? Auto-erotic or with friends? By all means, plan it on paper and see where it will take you. Good luck!