The Old Soldier is always preaching the gospel of show don’t tell. Show don’t tell allows the reader to live in a flash fiction story because the writer uses sense details, words about taste, sight, smell, touch and hearing.
Let me try this way of explaining show don’t tell: less summation and more action.
Or how about this. Figure out what motivates each one of your characters and figure out each character’s agenda and then don’t tell the reader. Just let your characters act out the story.
I hope that helps. If you want some examples of show don’t tell flash fiction, go to the top of the page and click on the Sexy Stories tag. There you will find the best show don’t tell erotica on the Internet.