Try searching for an "Adult Terms Glossary" or something like that. Then search for and download a free program called Domain Name Analyzer. Use the domain name generator tool to make several combinations of the words you found in the glossary. Then have the tool look up availability. If you have any experience with adult sites, you'll be able to tell which names make sense. Check namebio.com, dnjournal.com, and the forums for similar sales of those names, and do some other checks you can learn about by reading through the forums.