Pumbas Nakasak
Heading for the great escape.
I do feel Dumbledore's sexuality was alluded to a bit in his relationship with Gridelwold. Also a person can identify as gay or straight without ever being in a relationship. There are a lot of characters who have backgrounds that Rowling created but didn't make the books. Like McGonagol being married. For the most part if Harry didn't know it we didn't know it.
It was the wand play that gave it away.