Pay for that. Find some link sellers and pay...You can get unlimited amount of links but it will cost.
Like grabarz said you need to buy links, because directories usually do not accept adult sites. But ya if your site does not have any nude content then directory submissions can be looked into....few if not all would approve your submission.... Hope that helps...
just take a look at my pr2 site: hellkeyhole.com here you can read about my dofollow policy: hellkeyhole.com/you-comment-i-follow-range
Squidoo lets you build pages with article content and links to your Adult sites. You just have to make sure you select the Adult or X ranking when you first start to build the squidoo page, or they will be very unhappy about your content appearing in the G rated public zones - lol! Every page you build creates a PR 7 link to your site. Use the squids to create deep linking if your sites have a number of different landing pages, or affiliate products. Best free marketing tool in the world, in fact they pay you to use them by sharing the google ads and other monetization module commissions with you... even 100% of the commissions if you want..
Hi Neal, I have used zosap on many occasion for my escort website, the prices are reasonable the quailty of work is good, all in all a good experince.