Directories that have an adult category (accept adult sites)

I am looking for a list of directories that have an "Adult" category. I have several clients with adult sites. I know it's a controversial subject and am not here to discuss whether it is unethical or not and to get into any heated debates. I just want to know which directories have "Adult" categories to submit too.

P.S. - Google, Yahoo, DMOZ, all of adult categories.

Thank you for your input.