Why am I like this?

When I look at people the very first thought that pops in my head is how I can physically hurt them. I will sit and fantasize about hurting them and what would happen after. I would never act out on this impulse but the thoughts are still there. Lately its been happening to people I know. My boss had her gallbladder taken out recently and she came back to work today and all i could think about was punching her in the gut. My relationship with my boss is amazing so I don't know why my brain went to that place. I've had thoughts about my mother, father, and brother plus other family members.
Why am I like this?
Post Opinion