I have been creating/writing fan fiction and historic fiction for a very long time. Usually it is science fiction.

It is not an obscene fantasy, but it always had romantic/adult elements in it. Now that I decided to give up lust, I have to work on fiction without any questionable elements.

That is good, well done.

I wrote stories of science fiction / heroic fiction since I was 13 to 25 years.

In the beginning there was many adult elements and romantism (I was not as religious as now). At this point, like many of writers, I was considering these adult elements like a important element, 'the spice of the story' like many writers say... Especially in heroic fantasy, many writers think like that.

But, after few years, I returned into Teshuva, and I have realized that was a strong problem to write stories with these elements ! Even if nobody will read them, these stories have encouraged me to think to lust, to work my fantasms... And if I read them, I could remember many thoughts of lust. A very bad thing !

So, I threw down all my fan fictions that I have wrote with adult elements in it.
It was a very difficult moment (my rav helped me much), but after a time, it was clear to me that was the best decision. And I have never regretted it.

And, from this moment, I have wrote entirely 'kosher' stories (even in heroic fantasy)

I quickly saw that it was possible to write good stories without any questionnable element ! And my stories were also better than before, I think
Adult elements are not essentials to a good fan fiction.

Your decision is the best, keep it up !

Definitely, I will have to compose/write stories without adult elements and without female superheroes.

Even seemingly innocent stories with such superheroes add to my lust.

I sense some new threads coming in the "just having fun" section

>> I sense some new threads coming in the "just having fun" section

Not fun -- just escaping reality.