Prescription....

A married woman entered a Pharmacy,
Walked to the Pharmacist, looked straight into his eyes and said, "I would like to buy FAST HUMAN POISON",
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The Pharmacist asked, "why, what for ?
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The lady replied, "I need it to poison my husband",
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The Pharmacist shouted, "Lord have mercy, it's against the law!! It's a sin.
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Absolutely not, Shouted the lady. She reached into her bag and pulled out a picture of her husband in bed with the Pharmacist's wife.
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The pharmacist looked at the picture and screamed, "Why didn't you tell me you have a Prescription.... ?"