Only showing public service ads at the minute. With picture sites, you would get a lot more impressions and few ad clicks. However, maybe the googlebot had not determined any valid content to display ads for. Each page would be better having some descriptive content that was able to describe the picture and not flag is as inappropriate content (not sure if that is the case - but it can take a while for it to change from public service ads to normal ads).
i dont know for sure, but i think the string "pron" is a stopword.. you might not get any ads at all on that page.
i got it fixed. The problem was having pron in my directory. it should be working now. make sure to hit refresh. I have a url redirections so you can use saem link
a site like that is going to have a low ctr because of the amount of page views per person. you cant have adsense on a site that has porn,even if the ads are not on the same page as the porn. i think google might have a problem with some of those pictures that you have.