I remember my first time very well. I was about 14.
I had to poop so bad. I ran up to the toilet and stopped.
I wanted to know what it felt like to shit my pants. I squatted down before the toilet and gave a huge push. I feel the poop squish against my pants and ooze up my arse. I felt very turned on. I squatted there, gently pushing the shit against my butt.
I decided to have some fun. I put the toilet lid down and slowly began to sit in my shit. I could feel it oozing all the way up my crack slightly outwards. I got up and checked myself in the mirror. I saw this huge brown stain. I was overcome. I smeared the shit all over my arse. I squatted down and stuck two fingers up my butt and plowed myself until I came.
To this day, I love nothing more than squeezing big shits into my pants and smearing it all over my big round arse.