Sometimes a derivative work is so great it must be shared, even if it contains slightly dotty sex. Lisa Teez is the pseudonymous author of Sherlock Holmes and the Case of the Pampered Pussy, an erotic mind-control novel-in-progress that pits Holmes and Watson against a femme fatale with a very unusual hypnotic ability. The book is written in a delightful early-twentieth style, and contains odd (possibly unintentional) references to Raymond Chandler as well as B-movie master Rolfe Kanefsky.
Holmes and Watson are turned into occasional mind-controlled slaves by Victoria Hopkins, a woman who has come to them with a request to find her missing pussy -- a bejeweled cat that belonged to her father. But then it turns out that Victoria still possesses some pussy powers. I'll let Watson explain, as he awakens from a night of being Victoria's brain slave:
You cannot resist . . . you must read this fine and rare piece of fanfic . . . you will submit to me . . . you will read it . . .
Sherlock Holmes and the Case of the Pampered Pussy [NSFW -- via MCStories]