Well, i do have some.. https://www.literotica.com/stories (lots fun and lots unfinished) https://inkbunny.net (search filter change to document-writing)
The two largest 18+ erotica sites I know about are literotica and storiesonline. Easily hundreds of thousands of stories (if not millions) on both. Storiesonline has slightly better authors than literotica due to offering more features and better admin support, but literotica has a much better search feature and some great support for categories and genres and doesn’t require you to login every time. Literotica has also been around longer so it has more stories than storiesonline. These are my opinions after about over a decade of using both. Most other 18+ erotica websites I used over that time period shuttered in and out with offerings of dubious quality.
The problems with literotica are just too many especially considering that the authors in that site are mostly obsessed with either incest or ntr. Heck, i have read some of those incest stories and they are damn good but the problem is that only - they are incest I am just a couple of months away from being 18 so can i be counted as barely adult?
Literotica has a wide variety of categories so if you are seeing a lot of ntr or incest and do not want to, I suggest hitting up “erotic couplings,” and “romance” instead of “loving wives” or “incest” or “nonconsent/reluctance” which is where the darker stuff lies. There is an absolute metric ton of high quality vanilla if you know where to look.
@silentKitten Spoiler: Strictly 18+ http://www.truedirtystories.com/ https://www.lushstories.com/ https://www.indiansexstories2.net/