This fellow comes into a pharmacy and asks for a vial of Cyanide.

The pharmacist, trying to keep a professional posture, asked what he wanted it for.

He answered, I want to kill my wife.

Im sorry Sir, the pharmacist replied, but you will have to understand under such circumstances I cant sell you any Cyanide.

The guy reaches into his wallet and produces a photo of his wife.

The pharmacist blushes and replies, I am sorry Sir, I didnt realize you had a prescription.