>>3728037S-u-u-u-ure it is.
Try not wiping or washing it for a week and watch the skid marks multiply.
Not to mention the smell.
It would be worse than not washing your stinky foreskin, if you have one.
That's why dogs and other animals lick their ass all the time, because it's self-cleaning.
R-i-i-i-ght.
But don't worry about it, you can always find one of those gay boys who like to get shit on their dicks.