Why does Aminadab laugh when Georgiana dies in the birthmark by Nathaniel Hawthorne?

Aminadab laughs when Georgiana dies because he represents a raw and earthy side of human nature, devoid of the refined sensibilities that see Georgiana's beauty as perfect. To him, death is a natural part of life, and he finds amusement in the absurdity of humans trying to defy nature and achieve perfect beauty.