my favourite headcanon is pureblood wizarding society being 110% okay with queerness. like, nobody talks about it or bothers to come out, because it’s just assumed you’re probably some shade of bisexual. the slytherin dorms don’t stop boys going into the girl’s rooms like in gryffindor because bruh, as if that’s going to do anything about the amount of sex anybody’s having. homophobia is just another reason why muggles suck.
my other favourite headcanon is draco’s giant ass crush on harry potter being the the longest-standing form of entertainment in the slytherin common room. drinking games (”take a shot every time malfoy mentions potter” “do I look like I want alcohol poisoning”). bets (“a galleon says malfoy’s up that tree so he can jump down dramatically when potter walks past” “no way, but I’ll bet the same he’ll mention his father while trying to flirt” “deal”). continued exasperation (“potter’s ass on that broom is going to cost us the quidditch cup. I don’t think malfoy’s even tried looking for the snitch yet.” “every fucking year this shit”).
my third favourite headcanon is a gay muggleborn from a loving-but-homophobic family walking in on this giant gay-loving mess. maybe they’re sorted into slytherin, maybe they just befriend the one slytherin who’s not a douchebag to muggleborns, but either way they end up spending time around them and their total lack of heterosexuality. girls publicly making out on the first day back after hols and everyone telling them they’re gross because merlin, we all know you saw her like two days ago, daphne. neverending ending jokes about potter’s dick and draco malfoy’s desire to sit on it. slytherins who don’t even like each other holding hands in the corridor when they go past homophobic muggleborns.
one day this poor muggleborn is hanging out with the slytherins and finally realises their sexuality is totally a-ok here, and they’re thrilled to the point where they interrupt the elaborate planning of a snape-centric shampoo intervention to blurt, I’M GAY. and the slytherins just look at them, totally unimpressed and kinda confused. one says, “yeah, and do you want a medal or something?”
because they really don’t get how big a deal this is. another yells, “that reminds me! I heard parkinson fucked malfoy and guess whose name he moaned as he came” and everyone just simultaneously groans cos their quidditch chances against gryffindor are so fucked this year