True story - yes it really happened:
I was with someone once to do a temp job. This man I was working for was into experimentation with alternate psychological methods - and saw me as a candidate (ha!) to try out one of his methods, which was hypnotherapy. This against my knowledge and agreement. So while I sat there doing this work for him, he was playing music on his stereo to a certain tempo (or beat) and talking to me in a montone, suggesting things which he thought might be 'good' for me (he saw me as a 'needy' soul in need of some help!).
Unfortunately for him, he seriously underestimated my intelligence and my realisation of what he was doing. Remembering what he was trying to suggest to my subconscious mind later (no it wasn't sexual - he wasn't a deviate), I could appreciate that he was interested in my circumstances, but he was nonetheless trying to control me to his appreciation of how my life should be to his way of thinking.
Makes you think, though, how subtle hypnosis could be, subliminal suggestion and all that. The hypnotherapist, though use of repetition, music (beat), monotone voice (for eg) is trying to get the brain to operate on a different frequency thus to change the 'mind'. I've learned something by personal experience.