What if I intentionally over pour the milk on my brother's cereal on purpose?
Why do you feel the need to do something like that? That may just make him mad.
There is a possibility of me being addicted to violence. I had a lot of problems in my childhood and I was insulted a lot. And I have always been a very aggressive person.
Regardless of your reasons for doing so, it's wrong to touch or mess with other people's food. Doing this will cause people to be disgusted by you and distrust your actions. Instead, you should let people decide for themselves how they want their food to be handled.
Huh? This is just milk. It's not like I'm going to act on all that aggression.
It's not about the milk, though. It's more about the action, and it seems like what you said, you want to cause trouble, so you get to act out as a way to cope with your aggression. It's not fair to your brother, so you should probably not want to over pour milk onto his cereal.