"Casting this spell causes the Manhood of the creature seen during casting to seem to have no affliction during daily life, but if it impregnates a woman, then it causes the child to have birth defects such as deformity or disease. The exact nature of the birth defect is determined by the Aedile [ game master ]. If, however, a character with a Pestilential Penis impregnates a character with a pestilential pudendum (see the Pestilential Pudenda spell below), then the result will be determined by 1d100: 01-50 = healthy, normal child, 51-100 = born dead."