Well they help people mentally but unlike a therapist they dont just say how do you feel about that and subscribe you pills. They actually make you go into your mind and they fix your problems. (Like drug addictions, Phobias, remove bad memories, ect.) I've already learned how to perform Hypnosis so pretty much I just have 2 go through a colladge for it and get a Degree to become a Clinical Hypnotherapist.