Harry Potter is asexual and one day shows up at the Hogwarts Express wearing a shirt that says "MY ANACONDA DON'T WANT NONE BECAUSE I'M ASEXUAL HUN" (I just need this in my life ok) -H
Harry gets lots of high fives and fist bumps from muggleborns and half-blood wixen on the train. He gets some approving looks from some purebloods and half-blood wixen. But he also gets a looooooooot of questioning looks.
In fact, Harry gets so many questions, he ends up holding an impromptu Q&A session on different identities (and some muggle culture) in one of the carriages. He actually gets caught up in doing this before he even finds Ron, Hermione, Ginny, Luna, or Neville. They end up finding him. Hermione is, unsurprisingly, helpful with a wealth of knowledge in helping Harry answer questions and define terms. Ginny and Luna are, surprisingly, well versed in identity lingo and also help out.
It also turns out to be good practice for Harry, taking the lead and speaking to Dumbledore’s Army.
He does have to fight off a Slytherin, who just realized the word for how they feel is asexual, who felt that a snake-related shirt is misplaced in a Gryffindor’s wardrobe.
And that’s how Harry Potter sparks identity awareness in the isolated wixen community: muggle culture play on words.