In chapter 4 Bud, Not Buddy. why did Bud spilled on water in todd?

Oh, I read that book! it's good isn't it?

He spilled water on Todd because Todd always messed with him, then blamed everything on Bud. Todd's parents always boasted how Todd never wet himself when he was younger. So Bud poured warm water on his lower body to seem like Todd peed himself in bed.

I'm reading that. Book hang on let me get to that chap be right back