Tw: mention of self harm (this is a question btw)

why do people feel uncomfortable with seeing fresh self harm or scars?

This is a genuine question. I've always known that ppl dislike it I just never knew why, not because I was always exposed to it or something, but I just never felt repulsed by it. So I'm curious, why do people feel disgusted when they see fresh wounds or bruises?

(If I should change the flair, pls lmk. I'm unsure about it)