birth control pills
An elderly woman goes into a doctor's office and tells the doctor, "I'd like some birth control pills."
"But Mrs. Smith," the doctor replies, "You're 75 years old. What possible use could you have for birth control pills?"
"They help me sleep better," the woman says.
Confused, the doctor asks, "How in the world do birth control pills help you to sleep?"
The woman explains, "I put them in my granddaughter's orange juice, and I sleep better at night."