Question on Dofollow comments and adult content

I've recently started some adult themed websites. As such I know google can be a bit persnippitty when it comes to those sites to begin with. Some methods I've used with mainstream blogs and websites is doing searches in google with qualifiers looking for dofollow blogs in my niche. This ususally worked pretty good and I've been looking to repeat this process with my adult sites. With my mainstream sites they were useful blogs that had decent PR and were targeted to my keywords.

My concern is this: with my new venture there are few actual "blogs" out there in the adult world. Most of these sites are either link farms, picture sites, etc..

From an SEO standpoint do you think this would be harmful or helpful? Or since google sort of flags adult sites anyways would it be a moot point?

The site I started is deep in the SERPs and someone else started a new site and immediately popped to 2nd place on the SERPs. I have more content (actual news events, etc) than the competitor but he has more backlinks.

Any ideas or comments? Thanks warriors!