Like I said in another message thread here, I think Dumbledore stopped being gay or took a vow of abstinance after his relationship with Gellert Grindelwald turned really sour over the untimely death of Albus’s younger sister Ariana Dumbledore. Because of that sordid past, this explains why Dumbledore never took the job of Minister of Magic, because that past history would have become public in the wizarding world and Dumbledore would be forced out of office in very short order. Dumbledore instead became Headmaster at Hogwarts, a good place that will ensure his sordid past was unnoticed during his lifetime.
It’s strange that Rowling seems to think she has been so progressive and inclusive when actually she has written what is basically an indictment of the homosexual lifestyle—the downfall of Dumbledore’s life was his infaturation with another wizard. He opened his life and the lives of his family and friends to a great amount of evil because he allowed himself to be drawn into the misguided interests of another man.
On the other hand, one of the would be villains of the novels, Snape, is finally redeemed in the end because of his parallel infaturation with Harry’s mother. Even after her death he continued to protect Harry and work with Dumbledore (against his own personal interests which seemed to allign with Veldemort’s) because he loved Lily.
So I have no problem with Rowling saying that Dumbledore is gay. It was really his fatal flaw.
Must have been run by the teachers’ unions.