"Is one who has no heterosexual tendencies, though he may have had them in the past, no longer heterosexual?"
Yes
Yes
Well, now you are twisting yourself into knots in order to be consistent with your previously-stated contention that homosexuals who experience only passing thoughts about other men are no longer homosexual.
So, is the non-heterosexual priest androgynous? I'm curious as to how far out on this limb you're willing to go.