But do these urban/erotic fantasies have unicorns?

I suppose it's true that the ones I've read (not so many, I have to confess) haven't had unicorns, but I was taking the unicorns in Rowling's remark as more a sort of synecdoche, the unicorn standing in for the entire apparatus of the genre. (Or should I say metonymy?)

Any road, I sincerely hope for a flood of unicorn-proximate pron in response to this.