There used to be this TV show here in Brazil that is not really worth talking about, but it was a popular way to waste time as a kid. One episode sticks out in my memory - the main character plays a prank on his teacher by giving her laxatives. Then later in the episode, she struggles to not farting in front of the classroom. Then she can't hold it, farts, and runs out of the room and there's a noisy diarrhea scene in a kid's bathroom. After that I fantasized all the time about a scenario like that going over with my pretty teachers and other adults, and I taped it on VCR so I could watch it when nobody was around. A few years later I saw an American comedy where two British girls have diarrhea and play 'battleshits'. Around that time I also watched the anime 'Ginban Kaleidoscope' where the girl has constipated in one episode, which I liked, so I looked up more details and found fetish communities.