Is it okay that I fantasize about torturing people?
Why do you think you fantasize about torturing others?
I don't know, but if I could, I'd kill them in the most painful way possible.
It's very dark to fantasize about hurting or killing others. Actually wanting to do it is chilling. It would be good to seek therapy, to look into why you feel this way, and to find healthier coping strategies.
I wonder what it would feel to cut off someones nipples.
Having urges to torture and harm someone may mean something deeper is going on with you. It's going to be really important that you contact a therapist and talk out your thoughts.