You see, Giorno placing a frog up his ass was vital to the defeat of the villain because the enemy stand turned Giorno’s dick into a cactus. By placing the frog in his ass, he was able to hit the internal cactus reset switch thus stopping his dick from being a cactus and allowing him to throw the frog at the enemies face, their one true weakness that was foreshadowed at the beginning of the episode when the enemy jumped away from a frog because he was scared when Giorno was watching because Giorno made that frog because he had a hunch