This paper examines what can be learned from evaluating work with unsu
ccessful sex therapy patients. It is especially important to be aware
of potential iatrogenic effects. As much can be learned from unsuccess
ful as front successful patients as sex therapy tries to answer the qu
estion ''What type of therapeutic intervention, with what type of sexu
al problems, what type of patients, and what type of therapist is most
likely to result in a positive outcome?''