I've seen your posts, wolverinefan, various places. You have a fine, lecherous imagination. The thing is to take what you fantasize and try to describe it others. Unless you're big into setting up the victim/characters/situation, don't take too much time/words with lead-in. Let's get to the action!
If you start with WORD or something, you can sit on the file for a while, and come back to it and see where you've got too much here, too little there, whatever.
Then run spellcheck, read it over for grammar and continuity* errors, and post it.
And you've got a story posted, you filrthy sonofabitch!
*That means giving her 34C tits in the beginning of the story, but then describing her 36DD tits in the middle of it.