After taking a shit, you wipe and some of the toilet paper is left behind with the poop feeling like sand in your butt. In the shower is the only time to remove anal sand.
Guy 1: Hey man, I just took a slimy shit and I got some anal sand up there.

Guy 2: I had the same thing happen to me yesterday. Use some soapy water
Guy 1: I gotta go take a shower. It's chaffing my buns.
by BonofiedAnalGaping December 17, 2016
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