A lady walks into the drugstore and asks the pharmacist for some arsenic.
“Ma’am, what do you want with arsenic?”
“To kill my husband. “said the woman.
“I can’t sell you arsenic to kill a person!”
The lady lays down a photo of a man and a woman in a compromising position.
The man is her husband and the woman is the pharmacist’s wife.
He takes the photo, and nods. “I didn’t realize you had a prescription!”
This joke is included in the Black Book of Jokes. You can order it from here.