A filthy rich investor bought his gorgeous fit blonde wife a new automatic Jaguar coupe.
During the very first week of ownership, his blonde wife drives the car perfectly well during the day, but at night, the car just won’t move at all. After trying to drive the car at night for a second week without any luck, she furiously calls the Jaguar dealer and they send a technician out to the couple's mansion.
The technician examines the car's transmission, takes it out for a test ride, and finds nothing wrong with it.
So he turns to the blonde and asks, “Ma’am, are you sure you are using the right gears?”
Full of anger, the blonde replies, “How on earth you could ask such a question!? I’m not stupid you know! Of course I am using the right gears! I use D during the day and N at night.”