Is it normal to like the look and feel of bones

I don't know where it came from but for quite a while i have had a thing about protruding bones. I love sticky out bones - ribs, hips & collarbones. I like the way they look, feel with skin stretched tight over them. especially ribs. i like it on myself ( i will fiddle with my own) as well as sexually on others. This seems to be the reason i am always only attracted to very skinny almost anorexicly thin people. This is pretty strange though right? does anyone else understand or get this?
I also have a like of blood in a similar way that combined with the bone thing makes me question myself and my likes. i mean its beginning to sound like serial killer tendencies or something lol