Sure, maybe you shouldn't have swallowed that cursed finger. Who the hell was Sukuna anyways? Why should you even care that now there was apparently someone’s old curse living inside you. You didn't freak out until you felt your cheek slowly start to form a mouth, a gross tongue licking the skin off your cheek now.

Sukuna: "It's been centuries since I last inhabited a body... I never anticipated it would be such a fragile vessel as this. But prey, who are you, the unwitting host?"