What is a hands-free orgasm?
In a deep hypnotic trance the mind is in a highly suggestible state.  Many erotic hypnotists, including myself, have the skill to create highly charged arousal in their subject through the use of suggestion or fantasy.  For many listeners, the use of sound effects in addition to the hypnotist's voice can create such a heightened sexual experience that the listener's body will orgasm and ejaculate. 

Some subjects are unable to experience physical ejaculation and this is common.  Many have reported what is best termed as an "orgasm of the mind".  I call that experience a Mindgasm and it is very enjoyable without the need for clean up afterward.  ~  Mistress Carol