[Old Habit for a First Read]
A long time ago, when I was more prone to wear gobs of dark lipstick, I would leave lip prints at the corners of books as pagermarkers. It was a habit spawned from laziness: it was easier and quicker to do that than it was to find and relocate a bookmark. It was easy to find the last-read page, and the bookmark was never lost. Obviously, this works only one read-through per book, and only when one regularly wears lipstick. Recently, I've been wearing more lipstick [albeit not gobs of it] and I've found myself falling back into this old habit.