The school nurse at the high school where my husband teaches is never available. My husband is the science teacher, and many of the students come to him for health advice. He wasn't surprised when a junior girl wanted to ask him a question.
She held a condom packet in her hand. Although she doesn't date, her mother gave it to her "just in case". She put it in her purse and forgot about it. Recently she noticed that the date on the package had passed, and she wanted to know what to do about it.
My husband thought for a moment, mulling over several possible answers. Finally he said, "The best thing you can do with that is give it back to your Momma and tell her why."
The girl looked puzzled for a moment, then broke into a big grin. "Oh! You're right!"