I have the same sort of "problem" as the OP. I am an agressive person however this agression is more internal than external, I mean, I don't show it externally. I don't have any erotic pleasure from looking at cruelty but I do from imagining it.

Jodartha - why to Schwartzenegger? XD

Don't ask me:-)...I just used him as an innocent reminder of something that I dreamed about years ago.

The imagination is the private fantasy of the individual. I can assure you that my imagination is pretty rough from time to time too. But it doesn't extend to my real life. It just seems normal that the fantasy world can be especially rough at times...that is why it is called imagination.