Hypnosis is a temporary state of heightened relaxation and suggestibility during which some (not all) people are able to become so focused that they experience imaginary happenings as if they were real. Hypnosis is not some trans-like, magical state in which people will engage in behaviors that are completely against their "normal, non-hynotized" will.
People often believe that a hypnotist can make you do things you would never do, like take your clothes off and run around a crowded room naked. If you would not do this when you are not hypnotized, then you would not do it when you are hypnotized. However, if there is some part of you that would....well then, that may be a different story.