The correct answer is THE DRAGON FROM "THE LAST OF THE DRAGON" written by Edith Nesbit in 1925
..."So I tell you. If I wanted a princess I'd come and take her, in my own time -- but I don't. What do you suppose I'd do with her, if I'd got her?' .."
..."`Eat her, wouldn't you?' said the Princess, in a voice that trembled a little.
`Eat a fiddle-stick end,' said the dragon very rudely. `I wouldn't touch the horrid thing...."
..."The Prince and Princess looked at each other. What were they to do? Of course it was no use going home and telling the King that the dragon didn't want princesses -- because His Majesty was very old-fashioned and would never have believed that a new-fashioned dragon could ever be at all different from an old-fashioned dragon..."