For a long history, therapists have been prohibited against engaging in sexual involvement with a client. While the modern codes of clinical ethics contain no explicit mention of this topic, accumulative research have began to show that a large proportion of therapists have in fact violated this prohibition. The fact that such intimacies place the client at risk for exceptional harm has been recognized and acknowledged in different cultures. Until relatively recently, our understanding of therapist-client sexual involvement was based mainly upon theory, common sense, and individual case studies. Only in the past quarter century has a considerable body of systematic investigations informed us on diversified issues related to the topic with empirical data. The article summarized some of the findings in this area.

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