🔪🔪🔪🔪1/2 out of 🔪🔪🔪🔪🔪 The rules surrounding Giallo have been firmly established. Beginning somewhere around 1964 with Mario Bava's Blood and Black Lace and continuing to the present with such color-soaked homosexual freakouts as 2019’s Knife+Heart, Giallo has been around the block.