I did by accident. I was probably about eight.  I wanted to pee during the class, so I put my hand up to be excused.  Teacher said yes, so I got up to go to the toilet.  As soon as I stood up, she called the end of the lesson, and said we had to go out to the playground for break.  I didn't want to miss break, so went outside with the rest of the class, instead of going to the toilet.  That was stupid.  I knew there were no toilets in the playground. During the break, I got more and more de