See, this is why I think it is good for people to write fic even if the concept is bad. As long as they realize it. Then we can discuss. Because I think it is really fascinating that so many writers put that in. If nothing else, than in terms of when she stayed over during his recovery. It makes me think a lot of people may be sleeping platonically with people they are really attracted to and not doing anything (probably not) or people are just really desperate to make it so that something had happened before but keep it in canon. Or maybe it means that women get so much out of the sleeping part of "sleeping together" and are looking for a way to express that sex isn't all it's about. I think fic is such a good glimpse into people's secret fantasy world. If I was less chicken I'd write my dissertation about it.