There are a number of gay erotic story sites out there, and for my money, Nifty is certainly one of the better ones. See, when it comes to a good sex story, what I want is a website that makes it easy for me to get down to business. As soon as you hit the homepage of Nifty.org's gay section, you'll see that they have a number of sub-genres that hone in on specific gay stories. From athletics and college encounters through to interracial sex and age play fantasies, the world is your oyster on Nifty if it's gay text that you're after.
I'd estimate that there are at least 10,000 stories archived on Nifty.org, but unlike a lot of other sites, it doesn't appear to be all user-submitted content. This comes with the drawback of Nifty not displaying user ratings or having a comment section for the stories - something that I think other sites do well with. Still, there are millions of word here to read and with all of it being gay, you know you're getting a decent dose of erotic reading material.