I'm always trying to get a look in other people's sketchbooks. It's customary to say something kind of self-effacing when you hand your book over to a drawer you respect, such as "Oh, there's nothing so interesting in there." or "Do pardon all the swearing." A lot of times, though, people will warn me that their book is "messy." Some of these people have already seen my book and know that actual, physical scraps of garbage occasionally fall out of it!
Yesterday someone told me that they often started something in their sketchbook but would then erase it. That was pretty much the craziest thing I'd ever heard. Somewhere along the way everyone must have got the notion that their sketchbooks are supposed to be very tidy and contain only good ideas. I don't think I'd ever fill a book if I had those kinds of rules. Isn't this supposed to be fun?
Just for fun, here's some objects that fell out during the scanning process.