Are you a spine breaker? Or a dog-earer? Do you expect to keep your books in pristine condition even after you have read them? Does watching other readers bend the cover all the way round make you flinch or squeal in pain?
Heck no, I don't damage my books! I baby my books and treat them very carefully. If I bought a book new and was the only one to read it, it will still look brand new. Even when books aren't mine I cringe when people break the spine or bang them up. Since I'm so particular with my books I rarely lend them out.