Everything on Porn For Masses is submitted by Porn For Masses users, and after they submit a story, other people will read it and give it a thumb up or down. If that story receives enough positive votes, it is promoted to the Featured page.
Porn For Masses also offers each user their own "Featured" page, and the stories promoted to their own "Featured" page page are determined only by the votes of the people this user has previously selected - these are what we call, the user's sources.