>>13751813As a kid I never knew when I was "done" pooping and got used to pushing hard to make sure. Didn't know I was causing long-term harm until it was too late (high school). If you've been on /b/ enough you'll know what can happen, though mine wasn't anywhere near as horrifying as those images. I wish it had some funny story but it really was just childhood ignorance. Also, drink more water.
On the plus side, I beat Borderlands 2 while recovering and have almost no memory of it, courtesy of the drugs.
