Didn't MBTI originate in studying prisoners in a Pennsylvania Jail, so that wardens may get some rational decision making* as to how they'd house and manage their inmates ? *Suitably matched pairs could be housed jointly in the same cell, and yet not have one maul/hurt the other ? Sort of like a marriage ? Anyhow... to each her own. If you are creating stimuli (as an extrovert would) to see your personal experimental subject put out reactions, life can indeed be very entertaining.... especially if the subject-species do not suspect there is an experiment going on. Carry on and have a happy life.