A police officer spots a car parked in a popular make-out spot late one night, and decides to investigate.
He sees a young man behind the wheel reading a newspaper and a young woman in the passenger seat knitting. This is a puzzling sight, so he decides to find out more about these individuals.
"How old are you?" he asks the guy.
"Twenty-one, officer," he replies
"What about you?" he asks the girl.
She looks at her watch: "In about ten minutes, I'll be eighteen."
