Erotic hypnosis is meant to put you into a trance-like state, and make you orgasm without even touching yourself. One writer tried it out.
Erotic hypnosis is the practice of hypnosis for sexual purposes. This does not include hypnotherapy nor the therapeutic application of neurolinguistic.
That was my first experience with erotic hypnosis, and it sparked my recent desire to explore the practice more deeply in my local BDSM.