The first piece(s) of toilet paper used to wipe your butthole. The scouter will determine the viscosity, amount and consistency of the faeces having to be dealt with. After analysing the fecal matter on the scouter, one can assemble a "game plan" on how to further deal with it.
A good scouter is multi-layer folded toilet paper, which can handle even the worst of situations.
Just took a massive dump, couldn't believe my eyes when the scouter said there was nothing to be found. Feels good man.