“Conversion Therapy” flagrantly defies science and what is known (and has been proven, repeatedly) about sexual orientation. There is significant scientific evidence that at best it is ineffective and at worst it does significant harm to those who are subjected to it. It is this kind of shaming, unscientific practice that contributes to the high rate of suicide among gay and transgender individuals and youth in particular. As mental health professionals, we are bound to do no harm and to use evidence-based treatments with our patients. “Conversion therapy” has no place in professional practice as it defies science and is inhumane, ineffective, and unethical.