What I have learned about Fandoms purely through Tumblr in one sentence (spoilers maybe?)
There are two brothers who are having sex with each other and an angel, and one of them is a moose.
An English gentleman who is upset about being human will come in a large blue police box at any point in time to make the most ridiculous faces at you.
An otter and a hedgehog solve crimes in a division not covered by any man.
A woman has sex with a lot of aliens, while one man's butt saves the universe.
A man wearing feathers and obsessed with kittens has sex with anyone who has a penis, and a few chicks, too.
Game of Thrones:
Everyone dies, but only if they just promised to tell someone something important when they get back.
There is a superhero orgy and everyone is invited but the Hulk and Black Widow.
FUS RO DAH