Sigmund Freud and hypnosis
Sigmund Freud started his psychotherapy with hypnosis with the help of Breuer who was an excellent hypnotist and had no problem with use of hypnosis. However in 1895 Freud separated with Breuer.
Freud had lost his teeth thanks to over-abuse of Cocaine and his false teeth did not fit too well. Thus he lisped and soon discovered that his lisping precluded him from being a great hypnotist. Therefore he developed his talking therapy and developed the "couch" with the therapist sitting out of view of the client.
Freud mentioned that his talking therapy was for the rich and would need 300 sessions to produce cure. Thus for some behavior modification such as phobia cure Freudian Psychoanalysis may take years and systematic desensitization which uses hypnotic techniques may take up to twenty four sessions while the NLP fast phobia cure is typically performed in a single session.