I can see why it might come across offensively, even if I don't think it was meant that way. Then again, I may be neither teenager nor house-wife, but definitely lack both maturity and sophistication *and* read the occasional (historical) Mills and Boon stuff :). Dirty secret, but true.

And I guess that's exactly why I don't much go for het in fanfic - because very often, especially if it's more focused on romance than on character exploration, it treads very traditional paths, and I find the HP characters and plots too interesting for that...