This post is a little hard to read. But I appreciate your honesty with what is going on in side of you. It's like a warning bell as you know it's probably not right but are still having these thoughts. What are we supposed to do with warning bells? Act on them. Your mental health is in jeopardy here as it is not normal to want to hurt things, animals or humans. A fixation on it and getting a high from it requires professional help. A psychiatrist and a psychologist, both would help you. And agree that if your thoughts start to become obsessions and you may act on it, please go to a hospital. There is nothing to be ashamed of as mental health issues are not uncommon. But we want to keep animals, people and YOU safe--- so please seek the appropriate help. peace
A psychiatrist will be good if you want to discuss medication, but I'd suggest a psychologist for therapy to see where this thinking is coming from. And if you ever feel like you're going to do it, time to go to the hospital ASAP. Making someone or some other living thing suffer because of your pain won't make your pain better.
I find your post disturbing when you want to torture animals. It is illegal to do this for a reason. I suggest you see a psychiatrist to see what he thinks.