A childhood belief about weeing and pooing

As a little girl, I thought I knew the reason for separate girls' and boys' public bathrooms. I thought that both pee and poo must be fundamentally different in girls and boys. I thought the kind of toilets without tanks like I often encountered in girls' bathrooms were capable only of handling girls' excretions, and that what boys do wouldn't flush down them. Though I'd never seen what was in boys' public restrooms, I assumed there was a counterpart there that similarly couldn't flush what came out of girls. I assumed that only toilets with tanks on top, like the ones at home, were equipped to handle all four kinds of excretions. One day in Sunday school the teacher told us that the girls' room was out of order, and boys and girls would have to take separate turns using the boys' room. As fate would have it, I was pretty sure I'd have to poop before going home. I began to panic, thinking I'd surely make a mess in a boys' potty that wouldn't flush down. Years later I learned that panic and nervousness can cause diarrhea, and that surely must explain what happened next. While nervously sitting on a boys' potty I had my earliest experience I can remember with a really runny waterry stool. But what did I think at the time? I thought what I'd done must be a boy-type poo. Being in Church, I assumed that God had provided for me, making me for once do a boy poop, so it would flush down the boys' potty!