How do you think it got started?
Read what I wrote. The NARTH research points to sexual abuse and a number of other pyschosocial factors in childhood and adolescence. If I summarize them here, it will be misleading—the NARTH researchers say, basically, we just don’t know for sure but it does not seem to be inborn and we have some hints at how it develops but we need more research. We have to continue to consider it a disorder and try to find out but we would not claim to know exactly how it arises.
Before you argue with what I write, read the damn NARTH research.