I'm unhealthily fascinated with blood
What makes you fascinated with blood?
I am fascinated by the process of the blood flowing through the vein
I understand you may like Biology as a science. But, it's really creepy to be obsessed with something so morbid like blood.
Blood isn't that morbid, you find it in everybody. Blood is life.
That's a good point. I guess if you're fascinated by the science of it only then it's not so bad.