Never has it been sated in the research that homosexuality is genetic. LeVay's work pioneered work into evidence that there is a developmental disorder. Developmental NOT genetic. That is when something goes wrong between the "blueprint" of the gene and the production of proteins and the structuring of cells.
The subjects in such studies are genetically male and have no genetic abnormalities but something went awry in their early development that affected areas within a neural pathway of a neural system that controls sexual behavior. The hypothalamus, the basal ganglia, the amygdala are not 'gay centers' they are portions of a system that effects emotions and behavior. Alter the system - alter the output of that system.
As to "tens of thousands" of former homosexuals - that is a gross exaggeration. There are some who engage in homosexual behavior as a result of sexual abuse from when they were younger. The homosexual behavior is a symptom of a deeper trauma that produces many deviant behaviors. With proper therapy, some of these individuals can become more well adjusted in their sexual behaviors and relationships. This is one reason why homosexual behavior should remain in the DSM. However, that is a homosexual aberration from abuse - not the 'born gay' developmental disorder.
Cults like NARTH have a falsely inflated success rate. In actuality, the failure rate is about 85% and the recidivism rate of those "cured" is extremely high. This is from not understanding the population that requires treatment and the population that simply has a developmental disorder. It is easier to give sight to someone born blind than to 'cure' a homosexual with the NARTH brainwashing methods.
I'll leave you to trolling other old threads.
Yawn. There are many, many organizations that help homosexuals leave the lifestyle. Even Dr. Spitzer changed his mind that homosexuals can change, but don't let facts get in your way.
As to "tens of thousands" of former homosexuals - that is a gross exaggeration.
The facts state otherwise.
I'll leave you to trolling other old threads.
I'll leave you with some links regarding former homosexuals: