Is my interest in Domestic Abuse unhealthy?

I am a female in my early twenties. I'm very interested in domestic abuse, both mental and physical, and am currently writing a book centering around a (male) victim of domestic abuse. I have been interested in it for about three or four years. I am not depressed, and I never have weird thoughts about killing people or anything like that. I get along very easily with people, I'm not cruel to children or animals, etc. (in fact, I have a cat I absolutely LOVE and dote on), but I am very interested in domestic violence; some of my friends have gone so far to label me "obsessed". I have never been a victim of any kind of abuse. Does this make me very abnormal? I've never worried about my interest before, but something that someone said to me recently made me think. Am I extremely odd, or, even, a little bit crazy? Please help.