One time in grade 7 me and this guy in my gym class arrived a few minutes to late to class so our teacher made us stay 5 minutes after class, so when we went to the changeroom everybody else had already left so we were the only 2 people in the changeroom. While I was changing into my pants the other guy pulled down my boxers and slapped my ass

He was kinda cute but I couldn't really tell if he was just playing around or if he was actually gay so I kind of just laughed and then quickly changed and left
Not sure if that counts as harrassment