One night at "end of watch" I was driving back to the station. I was driving in the hills on a "no parking zone" street and saw a vehicle parked. I stopped behind it and went up to the driver. While walking towards the car I could see a guy in the driver's seat with a girl next to him. When I got to the driver's window the girl had moved over to the passenger's seat. They were both teenagers. I asked them if everything was OK and did they need any help. They said they were fine and had stopped to look at the view of the city lights below. I asked the driver, "does the veiw look better with your fly open, because it is." I gave them a warning about "having a open fly" and parking in a "no parking zone" and we all went home.