Usually gay-themed sites will make it pretty obvious by the URL what they are all about by strategically using any of the following words: man, gay, lad, etc… However, that is not the case at 3D Sex Stories.
The URL 3DSexStories does hint at the nature of the content being of computer-generated graphic toons and stories variety, but nothing about it would tell you all the stories were gay-themed. That is something you will find out when you hit the sign-in page, though. Some stuff is done using pencils to give classically drawn toon pics, but most of the material is computer-generated, 3D stuff.
The biggest section is the one called "gays." In it, you will find 50 collections of images. About half of them are stories where the pictures follow one another to tell a story of man-on-man loving. The rest is just collections of gay images. The "sweet fantasies" section contains 12 stories with a more fantastical theme. Then there is the gays and BDSM area has four stories and there are 12 stories in the bisexual category. Altogether, there are 78 photo sets and some of them contain high-res images.
There are no movies on the site, so that's it as far as the gay-themed content goes. It looks like videos are "coming soon," but I'm a little skeptical of that since they haven't updated in quite a while. It seems like updates have been discontinued altogether. The rest of the site is made up of bonuses including links to anime content, gay stories, vids, Flash content and some straight comics.
With a lack of updates, 3D Sex Stories isn't getting any bigger or better. As such, the site isn't worth a long-term investment of your time or money. That said, it does offer some nice pics, so it might be worth a quick look.