First of all you need to do some in depth research into both why the APA removed homosexuality from the DSMIII and the basis for reparative therapy. The APA decision was a socio/political decision that totally ignored over a thousand studies reported in the literature from 1936 onward that showed homosexuality met the standards for a "pathological condition" no different than depression, anxiety, fethishes and other paraphilias still listed as treated pathological conditions in the DSMIV.
The term "preparative" therapy was coined by Dr. Elizabeth Moberly after reviewing the available literature and theories that date back to Freud, Jung, and etc., therefore "preparative" therapy is a sound theory found in the history of psychoanalysis.
You see V-Agent I have dealt with this subject for about 22 years and have actually done the research, which you plainly have not. Now if you like other people who think psychology is the modern god to be worshipped are going to taut your theories then at least know what you are talking about.
Now you have used the term "empirical" to describe studies that suit your agenda, while at the same time referring to opinions based on observation and actual studies that empirically prove your position is wrong as "anecdotal" and this V-Agent is the main problem with psychology, the experts cannot agree and when a mental health expert challenges the status quo they are ignored for appealing to "empirical studies" that the liberals label a "conservative right conspiracy".
Now any study involving teens and pornography is in violation of Federal and State laws, which in themselves invalidate the credibility of such studies.