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I think if you actually want to orgasm, the hypnotic suggestions won't prevent that from happening ( I was always able to "break the spell").

Maybe you could try hypnosis that encourages you to stay chaste, linking positive feelings to not touching, so you would not want to orgasm that often. Aurelia Alder is offering that kind of hypnosis.

Also, I think a lot of repetition is necessary for changes to occur.

I think, in my case, hypnosis has reinforced my acceptance of certain concepts (chastity, serving etc.)

Hypnosis, suggestions, and a willingness to submit will discourage, not prevent. Biology and all that.

Fiona Clearwater has some 'walls-of-sound' mind-bending hypnos of varying lengths that might work. Jenny De Milo does as well .... throw them on for a few hours and I'm sure at some point you'll only want to stroke and edge. :)

Video-wise, Princess Miki has some excellent gooning vids. Throw a bunch of them on a loop, turn off the lights, and lose yourself for a while.