A woman goes to the drugstore and asks for arsenic. "What do you want that for?" the pharmacist asks. "I want to kill my husband," she replies. "He's having an affair with another woman." The pharmacist says, "I can't sell you arsenic to kill your husband, even if he is cheating." In response the woman pulls out a photograph of her husband with the other woman, who happens to be the pharmacist's wife. "I'm very sorry," the pharmacist says, "I didn't realize you had a prescription."
