By the way, I think that J K Rowling was sticking with what she knew because that's what authors like Jane Austen did...Austen never had any conversations between men in her books because she had never heard a conversation between men without a women present (since she herself was a woman).

I do think she could've done a little research though. She has enough money to visit overseas, in any case. She doesn't have to lift a finger the rest of her life!