Bog Books & Reading On The Loo

If you find a selection of books in a friend's toilet, which of the following conclusions is likely to dominate the impression you take away:

(a) your friend is intellectually curious with an snacking appetite for knowledge

(b) your friend has a somewhat twisted sense of decorum and propriety

(b) your friend has a blind spot when it comes to invisible organisms

...or perhaps you have a (d) to offer?

(d) is often constipated