A woman walks into a pharmacy one day and says to the pharmacist, "I’d like a poison that’ll kill my husband but make it look like he died of natural causes."

The pharmacist says, "Ma'am, not only can I not do that for you, I’m going to have to call the police and report you."

The woman removes something from her pocket and hands it to him. He looks at it and discovers that it’s a picture of her husband making love to the pharmacist's wife.

The pharmacist says, "Oh, you should have told me you had a prescription."