One Friday night

One Friday night, a policeman saw a car parked up at "makeout point." Shining his flashlight in the window, he saw a youngman fidgeting in the front seat glancing at his watch and a young woman sitting in the back seat and reading a magazine."Excuse me, son" said the cop, "but how old are the two of you?""I'm eighteen, sir, and" (checking his watch another time) "in ten more minutes, she'll be eighteen too!"