You know, after yesterday, this isn't hard at all :).

Merlin, Arthur/Merlin, modern AU, Arthur's journey with learning to ask for things in bed that he feels make him weak or are unconventional. Kinks of your choosing, because you're awesome and would totally make this work. So basically what you wrote, but longer, and modern AU because it's a different take. And I'm a sucker for modern AUs :).