I am a horny guy from Germany who lies to read and write erotic fiction and to ramble through red-light districts of the Web. I am looking for horny people like me who like to exchange their erotic fantasies by mail, ICQ or messenger.
Well I don't know about the exchanging stories, but there are plenty of stories to read around here, and many of the authors frequent the boards, so you never know.
As for the horny friends, almost everyone you meet here will be horny in one way or another, so my advice is just to start meeting people.
You might want to check out the Sexual Role Playing forum.