tiredI mean, the author doesn't have to go ahead and write the story of how they got together, although that is often nice. Even a "They had been a couple ever since a stray curse had forced them to snog for hours. After they'd been un-cursed, they decided that they rather liked it, and kept it up," would do. A little implausible, but no more so than the rest of it...
But established relationships where I don't know the background information tend to bore me, especially in a PWP where the words do not immediately seize me by the gonads
Same goes for, say, Mulder/Scully. Unless you make with the explaining pretty fast when you've got an established relationship, I'm going to leave the fic in a hurry because while I want to believe that they belong together, unless someone shows me how it could happen, I'm going to stay very, very skeptical, and that's going to ruin my enjoyment unless you distract me with a lot of plot very fast.
Also, unrelated -- careful with some of your imagery. "... A cesspool of spiralling emotions..." is not something I'd really want to associate with what you're undoubtedly meaning to be beautiful lovemaking. The rest of the fic is shiny, though, and wonderfully cute, just that one *facepalm* image. Nothing like raw sewage to jar a sex scene.
