There's this 17 years old kid who's taking an exam for his driving license..

The examinator says "It's night. You see a single light coming towards you.. What is it?"
K: "Well.. It is a motorbike! "
E: "No, no.. You have to be more specific. Is it a Ducati? A Yamaha? A Suzuki?"
K: "Ask me one more question! "
E: "Ok, ok.. It's night. You see two lights coming towards you.. What is it?"
K: "Well.. It is a car! "
E: "No, no.. You have to be more specific. Is it a Chrysler? A Chevy? A Ford?"
K: "Ask me one more question! "
E: "Ok, but this will be the last one..It's night. You see two enormous lights coming towards you.. What is it?"
K: "Well.. It is a truck! "
E: "No, no! You have to be more specific! Is it a MAN, a Volvo or a Mercedes?! You failed the test. "
K: "Ok.. Can I ask YOU one last question?"
E: "Sure. "
K: "It's night. You see a young girl in high heels, a short, short skirt and a bra. Who is she? "
E: "Well.. She is a prostitute! "
K: "No, no.. You have to be more specific!
.. Is it your mother, your wife, or your daughter?"