It's not okay to dunk someone's toothbrush in the toilet.
Fred dislikes his brother and sees his brother's toothbrush in the bathroom cabinet.
Fred wants to decide on what to do with his brother's toothbrush.
Fred decides to leave his brother's toothbrush alone even though he does not like his brother.
Fred dunks his brother's toothbrush in the toilet before returning it to the cabinet.
Fred maintains a normal relationship with his brother and eventually grows to like his brother.
Fred is caught in the act and gets severely punished for his actions.