Teacher's Bad Rowling Advice

[Rumil]

If you look at the first page of each author's first book, you'll find these two quotes-

The Bagginses have lived in the neighbourhood of The Hill for time out of mind, and most people considered them very respectable, not only because most of them were rich, but also because they never had adventures or did anything unexpected: you could tell what a Baggins would say on any question without the bother of asking him.

and

Mr and Mrs Dursley, of number four, Privet Drive were proud to say that they were perfectly normal, thank you very much. They were the last people you'd expect to be involved in anything strange or mysterious, because they just didn't hold with such nonsense.

though I do like Bethberry's elegant theory too!