Don’t make your characters sexual athletes. Make them talk and act like real people. Now that’s hot.
Erotica and the very short story are an unbeatable combination.
Here is a flash fiction short story about a hot sexual encounter between an older woman and a younger man.
For the world will always love lovers as time goes by.
Considering your audience…
If you live in an apartment in the city, just keep your eyes and ears open and you will have plenty to write about.