I was wrong. Adult content is allowed. Adwords policy says that the ad itself can't have explicit images and text. It's OK if the website has explicit materials.
I looked at spyfu and imlive has been advertising for 11 years and has ads such as "Watch Cam Girls Get Naked on Cam. Sex Show as Low as $0.98/Min" for keywords such as sex cams, live cams, etc... There's also a lot of others doing it so it's allowed. I went to your site and there wasn't an 18+ and over only prompt before continuing. Did you put any explicit text or images in the ads? Any ads disapproved? What exactly did you get banned for?
You might be able to reverse the ban. You have a much better shot than most people.