Things were really getting hot, and they were not paying any attention to what was going on outside. All of a sudden a policeman was tapping on their window. The cop could hardly contain himself.
"Didn't you know that you are not suppose to be having sex in public?" he asked the couple.
Being embarrassed at being caught, they said yes and apologized. "Well," the cop said, "I will have to write you a ticket." So the cop wrote the ticket and reminded them next time to watch their behavior.
After getting dressed, the girlfriend asked her boyfriend what the policeman wrote the ticket for. Her boyfriend replied, "Doing 69 in a 25 zone."