Actually, I just don't think it adds to the story, because sex isn't central to this or the HP stories. They are about heroism, moral choices, especially in the face of popular opposition, and about the interplay between authority figures and gurus (DD was more of the latter, at least for Harry, and some other principals try that route, too).

re your second question, you seem to have missed on how I found it refreshing that JKR wrote a whole series where sexuality was very subdued, and that that allowed to explore other aspects of human nature which, admittedly, often get short changed nowadays.

I should add that while I didn't grow up in Britain, some of the schools I went to, at the high school level and beyond, did have what you might call Victorian values. So I find my own youth sooner back in the Potterverse than in some other YA fiction. DD as a guru is also something I experienced from my principals.

--Geneva