[TOMT] Disgusting kids book

I very vividly remember when I was like 6 there was a series of disgusting kids books we had in our class library
When I say disgusting I don’t mean like creepy I mean these books were about piss and shit vomit and stuff. Like actual shit
I never actually red one but I remember the covers were gross, even as a child I thought “Who tf read this”

The covers usually depicted someone shitting or pissing themselves. One cover I remember is a boy pissing/ shitting himself while standing on a stage

I look back on it now i genuinely think this was some sort of weird fetish. I can’t remember the names of the books but I have a feeling it has “Gross” in the name but I’m not sure