Is it normal that i'm sexually aroused by males in pain?

As an elementary school student, I would imagine the attractive boys in my class falling off the jungle gym and lying on the ground in complete agony. It would give me pleasure just thinking about it, even though I would never wish that upon anyone. A decade and a half later, I still get enjoyment from imagining, seeing, or reading about males in pain. This ranges from emotional pain to gore. It has gotten to the point where I was watching a horror movie and a guy had was dissected and his organs were hanging all around the room still connected to his body and he was still alive and it turned me on so much. Reading pornographic fictions/comics with very gruesome and horrifying acts done on males is where I get my pleasure from. The male's age can range from about 6 (I know, creepy) to about 50. I might be a sadist, and I'm probably more extreme than other people, but is it normal to be sexually aroused by males in pain?