Anybody an SEO expert?

Google works with porn sites the same as with mainstream site, the only difference is that competition is higher, so there is more work to be done. Indexing your site should be a quick and easy job for you.

I see no text. Get rid of the top image and put a h1 tag with "smile for the cum" at the top of the page.
That is step one.

It is showing on the first place of Google for "smile for the cum" from here.

You can find more keywords, and try to generate traffic based on these keywords to your site. It will be probably long tail keywords(3+ words, mostly 3, I think, you don't want to go to far too - no search volume, I think), since these are less competitive etc.

1) Figure out what your site is about
2) Find related keywords
3) Expand the keyword list with tools like Google Trends, Bing Webmaster Tools, Free Wordtracker Keywords, brainstorming / plurals / permutations etc
4) Check search volume and seo competition for these keywords (Market Samurai)
5) Do on site optimization for these keywords
6) Do social media marketing
7) Do link building / content marketing after that (you might want to subscribe for a trial with Majestic seo, and pull competitors backlinks for your keywords to an Excel spreadsheet etc)

not many seo guys these days

Actually your site is already indexed by Google...
Here's also a great link to understand how Google works:
https://www.google.com/webmasters/tools