Why is Shigaraki always scratching himself?
When Shigaraki was a child, his scratching was attributed to him by his parents as “allergies” that were flaring up. As you can decipher, Tomura’s quirk of decay is seemingly having an adverse effect on his body, with the constant scratching not just being a sign of his emotions, but his power as well.
Does Shigaraki have hand fetish?
he has a hand fetish he likes to be pat but he hates getting touch, he has a mini collection of human hands in his room.