A lady walks into a pharmacy and asks the pharmacist for some arsenic.
The pharmacist says "lady you cant get that here, its deadly stuff and you could kill someone with it".
The lady looks him in the eye and demanded the arsenic again, said she just had to have it!
Pharmacist looks her over and said " no way, someone could get hurt.
The lady, irritated at this point says "well yes, I plan to poison my husband!"
The pharmacist just stares at her in shock.
The lady gives a big sigh, opens her purse and pulls out a photo. The photo is of her husband and the pharmacists' wife in bed together.
The pharmacist looks at it and says "Oh! I didn't know you had a prescription!"