Cant believe I actually looked this up:
"In rural agrarian communities, handfuls of straw were frequently used, but one of the most popular items to use for clean-up was dried corncobs. They were plentiful and quite efficient at cleaning. They could be drawn in one direction or turned on an axis. They were also softer on tender areas than you might think. Even after toilet paper became available, some people in Western states still preferred corncobs when using the outhouse"
https://www.farmersalmanac.com/before-toilet-paper-24419