I haven’t had to repair my surgery yet… I’ve just been bumuming that it’s untouchable, which surprised me, yes, but seemed sensible enough (unless you’re an emo cutting yourself or a camwhore pushing her bewbs too much or something, which leads to the wonder of fapping, though T.R.O.L.L. Level 2 is better). As for books, I’d say it’s from flipping through them in the heat of battle; if we go ahead and call them e-books, then the mbumive scrolling and/or Ctrl+Fing of them could also lead to some sort of weird deteriation.