A woman walks into a pharmacy

A woman walks into a pharmacy…
She goes up to the counter and the Pharmacist asks, “May I help you?

“Yes please,” she says. “I’d like some Arsenic”

“What do you want that for?” asks the Pharmacist.

“I’m going to kill my husband.” She replies.

“I can’t give you that!” exclaims the Pharmacist.

She reaches into her pocket and pulls out a photo and lays it on the counter. The Pharmacist picks it up to look at it. It is a picture of her husband having sex with the Pharmacist’s wife.

“Ooooh!” says the Pharmacist, “I didn’t know you had a prescription!”