All SEO experts agree that links remain the strongest quality signal to search engines, outweighing most other ranking factors. However, with Google's Penguin update and manual link spam actions in play, building link for your website has become a "skating on thin ice" practice, unless... you know the rules of safe and effective link-building to follow in 2015.
Do directories, forums, blogs or other sites, mention you? If so, have a look to see if they also have the correct or indeed any link back to your site, if not ask the sites owner if it would be possible to add a link, but remember as much as possible to keep the anchor text (the text used in the link back) different on each site.
Do you know what reviews on the various escort sites and forums are out there about you? Run a check, a simple Google search will pull up all sorts of things you may not have known about, again spend some time checking links are up to date. Plus if your reviewed somewhere you would prefer not to be ask to be removed.
Something the escort industry has never really picked up on, the idea is that one site gets content, the writer gets links and exposure. Done correctly this is still a valid strategy, especially in a "special interest" area such as escorting. Contact an escort blog owner you admire, offer content, or ask them to post on your blog. Done little and not to often this can and will benefit everyone.
Do you mention your site with a link when posting to twitter? Do your clients mention your site when engaging on social media? If not why not.. again this will create "buzz" around your business and is measurable by Google