I want some arsenic.
A lady goes in to a pharmacy.
The pharmacist asks "How can I help you?".
She said, "I want to buy some arsenic please".
He said, "What would you be wanting with do with the arsenic?"
She said, "I want to poison my husband."
He said, "Lady, I can't give you arsenic to poison your husband".
She reached in to her bag producing a picture.
The pharmacist looked at it and saw it was a picture on his wife having sex with her husband.
The pharmacist said, "Goddam lady!!! You never said you had a prescription!!!"