Micro Derm Abrasion 

Micro Derm Abrasion is what happens when you use cheap toilet paper - it makes your butt raw after repeated wiping much like sand paper would do.
Micro Derm Abrasions are common in office buildings, gas stations, Grandma's house, etc. In extreme cases there are chunks of wood embedded in the tissue.

Using the toilet paper in our office building is like getting a Micro Derm Abrasion on your butt.

Micro Derm Abrasion by 9key April 24, 2006