A woman went into a drug store and asked the pharmacist for some cyanide.
“Why do you want cyanide?” the pharmacist asked.
“I need it to poison my husband,” the woman replied.
“Are you out of your mind?” the pharmacist said. “I can’t give you cyanide to kill someone! It’s against the law! I’d lose my license! They’d put us both in prison!”
The woman reached into her purse and pulled out a photograph of her husband in bed with the pharmacist’s wife.
The pharmacist looked at the picture, then he said, “You didn’t tell me you had a prescription.”