She tells the Pharmacist, "I need some cyanide."
"It's very poisonous," he tells her, "What do you need it for?"
"I need it for my husband," she tells him.
"What does he need it for?" he asks.
"I need to give it to him," she replies.
"You'll kill him if you do that," he erupts, "I can't give you cyanide!!! I should call the police. What are you thinking?!!?"
Meanwhile the woman has pulled a photograph out of her purse.
"It's Illegal, I can't sell you cyanide!!!!" continues the pharmacist.
The woman shows the Pharmacist the photograph. It's of a man and a woman, naked in bed. "That's my husband," she says. The Pharmacist recognizes the woman as his wife.
"I'm sorry, Madame, I didn't realize you had a prescription."