Oh dear.... I have thought about this question - and quite honestly - if I have borrowed the book from the library or from a friend - I will treat it with the utmost care - cherish it almost, as I like my books to receive the same treatment when I lend a book.
However, after saying that, if it is a paperback - for holiday - say for instance, and I am at the beach (in the pool on a lilo) then I am afraid that If I am really into the book and cannot put it down for long - the corners do get turned down. *sigh*
My hardback books are all still in their prime condition, loving stored in a bookcase, but some of the others (only paperbacks) are dog-eared and are what I call, well loved after several reads. Sorry to admit this.
I guess I just get too involved and if I am doing the housework, with a book in hand:tong: its not always possible!
I always start off with such good intentions, and have lots of bookmarks scattererd around - but.....
you know what they say about good intentions..