An elderly woman goes to the doctor and says,
“Could you please prescribe me something against my headaches?”
“OK,” says the doctor,
“take this and come back in two weeks.”
After two weeks, the lady is back and complains,
“I’m sorry doctor. I’ve been using this for the past two weeks, I followed the instructions on the package – but nothing happened.”
The doctor is concerned,
“That’s unusual Mrs Grimky, what were the instructions exactly?”
“Well, keep the lid tightly screwed on at all times.”