I never minded the random scribblings of other readers, found them interesting in fact. It is a truth universally acknowledged that people write the darndest things in the margins of their books.
Certain bookworms eat books. Eat them, swear in them, spill things on them.
Reading, for me, is like this: consumptive, pleasing, calming, as much as edifying. It's how I feel after a good dinner. That's why I do it so often: It feels wonderful. The book is mind and I insert myself into it, cover it entire, ear my way through every last slash and dot. That's something you can do with a book, unlike television or movies or the Internet. You can eat it, or mark it, like a dog does on a hydrant.