You sad bloody peasants and your paper books that have pages. My Nook is its own bookmark.

Even back in the days of yore when I read actual books, I would often be too lazy to find something to be a bookmark, and would just remember the page number. And by "remember" I mean "glance at the page number for a fraction of a second and then forget it immediately thereafter," and so I would flip through some pages before getting back to my spot.