Because wiping with leaves hurts.

lovely

When the toilet paper isn't slippery while wiping the rectum area. As long as there is material around the anus, it will be slippery when wiping. When there is none, the toilet paper doesn't slide as good. That is the method I use as I cannot see.

Through doings this many times it can but only from the spots where the paper towel was touching.

yes, wiping vigorously with toilet paper can irritate the skin around the anus, making it itchy or sore