Smearing feces over the perineum is a filthy Anglo habit Other cultures wash with water. Its simple to connect a tap with hose to the pan's feed pipe. Then jet your anus clean. Reserve a towel for drying exdusivly. A few dollars for a non-soiled bum for ever.What if there aren't any leaves? Or, only poison ivy? Soil, sand or water can clean the bum too. One can wipe with sand or soil.....or water. Sand can clean all kinds of stuff.
And with the way things are going, in the future, it will probably be a rinse and a dry for all. Dry air duct toilet seats. Cool dry air will make you pucker.