To avoid making an embarrassing and unpleasant scene in public. And on the rare occasion that his toilet actually does get clogged, he just uses an old dirty stick to break down the blockage. As if his bathroom habits couldn't get any worse, the Grinch rarely wipes himself with toilet paper, instead, majority of the time, he sits on the floor and scoots his soiled butt across the ground, leaving behind smelly trails of feces and skidmarks, until he feels it's clean enough to proceed.