You have massive SEO negatives working against you.
First, I would like to know the *legality* reason behind having a splash (aka totally worthless seo sabotage page) for the index? That is the most important page and it is killed with bullshit. I'm pretty sure back in 1998 there was a big *scare* that all adult sites needed it but pretty sure by about 2000 or so it was deemed totally ineffective to advert underage surfers from viewing content.
Then... you have no meta description whatsoever..., none of the stuff that matters in the code
Also, you have big images at the top of your most important pages and even text in an image...
Sitemap, title, description, get rid of splash page, put the keywords you are trying to hit in title and H1 tags... follow that... you will see a *huge* increase in type ins.
good luck