Druggist

A lady walks into the drug store and asks the druggist for some arsenic.

The druggist asks, "Ma'am, what do you want with arsenic?"

The lady says, "I'll use it to kill my husband." "I can't sell you any for that reason," says he druggist.

The lady then reaches into her purse and pulls out a photo of a man and a women in a compromising position and shows it to the druggist.

The man is her husband and the lady is the druggist's wife. He looks at the photo and says, "Oh I didn't know you had a prescription!"