Professor, why couldn't we just Apparate directly into your old colleague's house?' 'Because it would be quite as rude as kicking down the front door,' said Dumbledore. 'Courtesy dictates that we offer fellow wizards the opportunity of denying us entry.
J. K. RowlingWhether you come back by page or by the big screen, Hogwarts will always be there to welcome you home.
J. K. RowlingGinny Weasley, who sat next to Colin Creevey in Charms, was distraught, but Harry felt that Fred and George were going the wrong way about cheering her up. They were taking turns covering themselves with fur or boils and jumping out at her from behind statues.
J. K. Rowling