Hi @alexanova - Firstly, welcome to Steemit! I only found you because of @mattclarke and the discussion about perspective and the NSFW tag.
Sadly, as with any platform there will be some kind of backlash for anyone who does things differently. Definitely use the NSFW in your title if you are posting anything of a racy nature, which includes baring skin or even writing racy scenes. Heck, I believe NSFW has also been used for horror of an explicit kind just to forewarn our sweet readers.
And actually, I believe if you have nsfw in your tags it doesn't show up in the feed at all - at least that's been my experience when I wrote an erotica piece - so I've only used it in the title since then. I have not tried xxx as a tag.
Please don't get discouraged by the flags. I know that's tough to do but you are actually a trailblazer here for the porn industry. That, in my opinion, means you are a keystone player. At this point, the ones flagging you have a lower reputation score and less SP so their down votes may hurt your ego, but it won't hurt your reputation here.
From what I've seen so far, you have been quite respectful, eager to learn the platform, and graciously outraged LOL. I love it - and I will remain in your corner to defend you if need be.
Thank you so much for that!! :)
Appreciate your comment <3