A subject is on a test for employment. The employer addresses the candidate and says. - I will give you the final test for your admission. - perfect says the candidate. Then the employer asks. -You are on a dark road and you see in the distance two paired headlights coming towards you. What do you think it is? - A car, says the candidate. - A car is too vacant. What kind of car, a BMW, an Audi, a Volkswagen?? - You can't tell, right... - Oh, you're doing poorly, very poorly - says the employer, who continues. - I'll ask you another question. - You are on the same dark road and see, only a lighthouse coming towards you, what is it? - A motorcycle - says the candidate. - Yes but what kind of motorcycle, a Yamaha, a Honda, a Suzuki? - I don't know, on a dark road, you can't tell (already a little nervous) - That way you won't pass - says the employer - Here's the last question - On the same dark road you only see a lighthouse again, but smaller and you realizes that it comes much slower. What is it? - A bicycle. - Yes but what kind of bicycle, Uma Caloi, Uma Monark? - I do not know. - You fail, says the employer. Then the candidate goes to the employer and speaks. - Interesting, this test. Can I ask you a question too? - Of course you can. Ask - You are in a lighted street. You see a girl with heavy makeup, a very short red dress, twirling a bag, what is it? - Oh! -says the employer-she is a prostitute. - Yes, but what kind of whore, your sister, your wife, your mother...?