John C. Dvorak on search engines and site popularity and stuff.
I could have it wrong, but I think that "free porn" is probably a really, really bad bet for upping site traffic. Unless you have "free porn" reiterated every few word -- free porn this, free porn that, free porn the other -- you're probably not going to get good search engine position out of the word combination "free porn." There are just too many "free porn" sites out there to compete with.
But we can try.