It has multiple uses, especially if you are in wilderness.
Clean/wipe dry dishes, hands etc.
Start fire, although not as well as wood chips or other means designed for it, they're usually kept in water tight or nearly watertight container or bag, and they're close. All you need is matches(or other means of making fire) and some firewood and you'll have fire quickly, which is important if you're in risk of freezing to death. If you're using oil or gasoline to start fire, they work better if you soak toilet paper in them.
As a towel.
Even in urban environment it's handy to have something to wipe your hands with. You can fit enough of it for most purposes in pocket. Go to Comment
The multiple-worlds theory of cosmology allows room for every religion's Heaven and Hell and other planes to coexist, with the similar planes of all the sapient beings of all the worlds in all the galaxies...How often do the wires get crossed, as it were, leaving your paladin in a Hell for hedonistic lizards, for example.