Being one that dabbles in writing it's nice to know where they post stories.... here are a few links you might enjoy.
1.
The Erotica Readers & Writers Association They post new stories monthly and have different thems. They also have different lengths of stories too. Sometimes you just want some thing hot and quick, I know I do. They have a good vairety and great resources for writers as well. (Aside from lit this one is my first pick for stories)
2.
Alt.Sex.Stories Text Repository This is a huge site with many, many stories. I'm not hugely familiar with it - but it a free site.
3.
SatinSlippers.com is targeted to women, but they do not discriminate. THey have a few stories there and expect a degree of quality. I had to work a little bit to get one of my stories posted there. It is also free. This one does have pics of Men... yum!
I can give you more, but then you are beginning to get ore specialized. Which is also another option ... if you are seeking a specific type of story you can type in a search ... for instance... "cuckhold stories" and you'd be surprised... or "fetish stories"... or anything you desire...
4.
Jane's Guide Will always give you the scoop on sites too, if they are free or paying and how good they are.
Probably more than you wanted to know.
and hope I haven't broke any Pixie Rules here.