I think the The Charlie Weasley thing is all about the possibly attainable...*g*. I was watching the "year in the life of JRK" thing on TV tonight, and was reminded that she actually said he was (a) straight and (b) unattached...it's the next best thing to canon! When fandom persists in making all the pretty boys only interested in each other, a single fangirl's got to have someone to fixate on. The dragons have got to be less of a challenge to get past than the combined forces of slashfic.