Guy Walks Into A Drugstore...

and tells the pharmacist the he would like to buy some strychnine. "Why would you want that" asks the pharmacist. "To kill my wife" replies the man. "Whoa, I can't sell you something to kill your wife, are you crazy?" Without a word the man reaches into his back pocket, withdraws his wallet, digs a picture of his wife out of it and hands it to the pharmacist. The pharmacist takes one look and says "Oh, I didn't realize that you had a prescription!"