First thing is analyze your stats and referrals to see what keywords they're finding you with, so you can target that. There might be a module or add-on / plugin you can use. It can "highlight" your site like google does. I think what you're experiencing is members hitting your blog based on specific search terms like " mexican girls and thongs " but then having a difficult time finding why it led them to your page. The blog is a really long page with lots of text and images. Finding a way to help them find what they were looking for faster, easier.. should help. A good plugin might watch for SE hits, and add a link at the top of your page that searches your site if clicked.
"Looking for:
mexican girls and thongs ? - Search our Site!"
Then the link might take them somewhere like:
http://www.fuckingbikini.com/?s=mexican+girls
Just a little tweaking and you might improve your conversions on some of that good SE traffic.