Harry's background

He had shared a kiss with Dean last year before they had all left for home.

Before that, in the prefect's bathroom the night after Harry had figured out the egg's clue, he and Cedric had shared an intimate moment in the bathtub, much to Moaning Myrtle scarcely concealed delight. Harry resembled Billy Budd...the naive and beautiful young sailor who aroused nearly all his crewmates. (Snape=Claggart)

Harry remained almost unaware of his homosexuality until Isabelle Desiree came along, and with a shock, Harry found himself unattracted to her. Instead, Draco Malfoy began to look more and more desireable. This sudden awareness brought denial. Harry retreated into his mind, which as filled to the brim with warnings of his enemy, his heroic potential and expectations...