Nothing improves your ranking on search engines like one way links so you should be out there building links all day long. The best links come from sites that relate to your niche and are filled with relevant words.
One easy way to build links is to write short articles and post them to article sites. The problem is that most article sites don't welcome adult content so writing about your niche is tricky. One article site that does publish adult articles and stories is
Triple X Articles (www.triplexarticles.com).
Articles should be 300+ words and there is room at the bottom for links to your site. The best part is that other sites take content from article sites to republish via RSS. That means that links in your articles will start showing up on other sites, email newsletter and ezines. If the article is good it might even get featured on the home page.
This is more valuable than comment spam and easier to do. Post as many articles as you want and build tons of links to your site. Google crawls article sites all day long so these show up quickly.
www.TripleXArticles.com