This person admits to staining the back of their math teacher’s pants to prove they wore the same pair every day. Why? Who knows? Maybe they weren’t a fan of this instructor. Maybe they did this on a dare with friends. You know what kids are like. While this isn’t a major felony, it’s certainly embarrassing for the teacher. It damages their dignity.
But kids pull harmless pranks all the time. It’s part of their modus operandi. Kids will be kids. Perhaps this was part of a dare from a fellow classmate. “Prove Mr. Carter wears the same pair of pants every day and we’ll let you sit at our table for lunch!” I wonder if the teacher ever found out about this.