35+ years ago I was the bigger kid and used to get beat up on a weekly basis by smallish underfed little degenerates.One day much like Casey I decided I was not gonna take it anymore, two bullies started their punchfest and it ended with both of them runnin home to momma leaving a nice blood trail.
From that day on I NEVER got picked on again.
Bingo! Bullies only target those they feel will not fight back!