There are many misconceptions surrounding hypnosis. People often think it is something mystical or magical or otherworldly, but it is infact one of the most natural states to be in.
With stage hypnotists making people eat onions as if they were apples or dancing around a stage being a chicken, it’s not surprising that people can think that under hypnosis you relinquish all control of your mind to someone else, for them to do with as they please. But that is NOT the case. Someone in an hypnotic state CANNOT be made to do something they do not wish to do. Thus those people eating onions or dancing around like a chicken WANT to be doing that - more often than not because they’re stood in front of a large group of people and don’t want to look foolish!