"Look Into My Eyes" gives an eminently readable and easily-accessible introduction to the topic.
"David Shade's Manual" gives a broader survey of what can be done. On the advice of his internet marketing consultant, David removed the book from the market, and repackaged it in a much-higher-priced form as the "Masterful Lover" "Advanced Sexual Hypnosis" product.
Mark Cunningham, David Shade's teacher and mentor, has demonstrated techniques for training women to have massive orgasms instantaneously, on verbal command. Mark states that the exact same techniques also work on males, but one must understand that "orgasm" and "ejaculation" are not the same thing.
The actual technique is simple. Any competent hypnotist should have no trouble at all. The hardest part is likely to be finding willing practice subjects. (At the same time, since I trained with Mark, I may have a biased viewpoint on what constitutes "simple competency", as opposed to "expert-level mastery" in hypnosis.)
The demonstration DVDs were handed out as freebies for attendees at Mark's "Last Lecture" seminar a few weeks ago. They will be given out as bonuses at David & Mark's "Erotic Hypnosis" seminar (sold out) in Vegas next month. They are not currently otherwise available. It is my understanding that the techniques will be demonstrated, live, using the subjects from the DVDs, but not practiced in the classroom by the attendees. (Homework assignments will be given.)
The first time Mark and David taught this seminar, it was recorded, and sold by David as "Secrets of Erotic Hypnosis". The product is currently not available, but David has indicated that he may again offer it for sale at some time in the future.
Mark has also taught seminars on using hypnosis for conditioning for "consensual slavery". I am an alumnus of the first such seminar (and I have the certificate to prove it).
Mark has retired from teaching mainstream hypnosis. He is currently working on "something", related to all of the above, but is not talking. Stay tuned...
Brian David Phillips, based in Taiwan, sells an "erotic hypnosis" DVD product. Beyond the price ($400), I have no knowledge of the product.
http://www.youtube.com/watch?v=wEG_qvJP3hg is a fun demo.