Lady goes into her local pharmacy where she has known the pharmacist for years. After small talk, the pharmacist asks what he can help her with.
"I need some cyanide." she says.
What do you need cyanide for?" he asks.
"I need it because I want to murder my husband!" the lady exclaims.
"I'm sorry, but I can't give you cyanide! That would put both you AND me behind bars for YEARS. Murder is nothing to fool around with!"
The woman then reaches into her purse and pulls out a picture of her husband having sex with the pharmacist's WIFE.
"Oh, well now. That's different. You didn't tell me you had a prescription!"