You know why you're here. You've seen the movie. You're asking yourself, "So where was the gratuitous Emma Frost as White Queen in a corset? When did Mystique totally make it with Beast? WHY IN HEAVENS DID XAVIER AND MAGNETO NEVER MAKE OUT?"

Well, children of the atom, that's what fanfiction's for. This is a kink meme. The theory goes like so: you write a prompt in a comment, labelled with pairing or character (if applicable) and a vague summary. You post this comment. You go around and write/illustrate/etc any prompt you find the inspiration for. And then we all get what we want.