it's just when people force ships outside of their sexuality that I dislike.
So, like 90% of shipping, in every fandom, ever.
Many years ago, I had an assistant manager who was a huge Harry Potter geek. She avidly read all the books, went to the midnight releases parties, the whole bit.
And she was a massive, massive Remus Lupin/Sirius Black shipper. Used to go on and on about how it was SO OBVIOUS IT WAS PRACTICALLY CANON OMG.
At the time, I hadn't read any of the books, so I was like "Eh, whatevs". But then later on I got around to reading the books. And when I got to The Prisoner of Azkaban, I dove in, looking forward to finding out how this OMG SO GAY couple worked out on the page.
And when I finished the book I blinked a couple of times. "Did I miss all the gay?", I wondered. 'cause I sure as hell didn't see any.
So the next time I saw her after that, I asked her. "Which were the specific bits that make them the gayest couple in Harry Potter?"
Turns out it was a single hug between the two men near the end of the book. That was her canon evidence.
Let's just say that I did not find her arguments persuasive.