T wo middle school boys in Oregon are scheduled for trial on Aug. 20 to face charges of harassment and sexual abuse for allegedly slapping female classmates on the rear end in February.

According to ABC News, Cory Mashburn and Ryan Cornelison, both 13, face up to 10 years in jail and a lifetime as registered sex offenders if convicted, all over a stunt Mashburn claims was practiced by girls and boys alike every Friday during school.