This therapy is highly unethical. It leads to a higher rate of suicides among youth. The APA and the American Academy of Child and Adolecent Psychiatry both view it as unethical. Conversion/Reparative Therapy is based in the concept that homosexuality is wrong and needs to be "fixed", therefore the agenda is already determined, which does not respect the clients ability to direct their treatment. There is no evidence that it is effective. The originators of Reparative therapy use the concept that homosexuality is  caused by poor attachment and nurturing from the same sex parent. But there is no evidence that single parent families, same sex couples, or military couples (where one parent is often absent), has any impact on the rate of homosexuality among thier children. So their theoretical foundation is false. This therapy is harmful. It is not our job as practitioners to determine if someones lifestyle is right or wrong, only to help them be their best selves.