jmurph wrote:but nobody is going to worship a huge festering pus bag. Even those who are bloated, rotting masses generally don't like being that way.....
It's exactly those kinds of people that DO worship Nurgle in the WFB world.
Nurgle is not worshipped so that one can be caked in disease, He is worshipped (primarily) for relief from such contagion, as often Nurgle's power is the only way a victim can be relieved of their anguish.
Imagine, if you will, a town ravaged by plague. The inhabitants are desperately seeking a cure, but with 90% of their population dead and the rest dying they are hard-pressed to come up with anything. In desperation, they forum a cult dedicated to Nurgle in the hope that He will have mercy upon them and spare them from the horrific pestilence sweeping through their town. If Nurgle chooses to help, then He will grant them immunity (or near-immunity) to death and/or pain from the disease, and their lives and souls now belong to Him.