Fetishism has started to become less taboo over the years, but one sexual fetish that still remains relatively unexplored is Haematophilia (or, Haemotolagnia). Case in point: You probably have never even heard of the word before. In layman's terms, it's the blood fetish. While some get freaked out and even faint at the sight of blood, others revel in it and become sexually aroused by it. Those with the fetish find blood exciting and love seeing it on their partner or even on themselves. Not much research has been dedicated to figuring out the blood fetish, but what we know?