Here you go.
I am thinking you made a spot on reply here. It makes a lot of sense.they probably just wipe a couple of times and zip up
and if it starts to get creamy/itchy later on, they just go back and wipe a couple more times.
also, using 3 sheets to wipe is pretty minimal, so you will probably have shit smell on your fingertips when you are done. hope you wash your hands.