A woman and her 5-year old son are taking a bus home...

It's late in the evening and their stop last one on the bus route. All of the other passengers have disembarked, so it's just the woman, her son, and the bus driver.

The boy looks out of the window and sees scantily-clad young women standing on a street corner.


"Mommy," says the boy, "what are these girls doing so late at night?" The mother, not wanting to tell him who they really are replies, "Well, Johnny, you see, these girls have a job, and they don't have enough money for their own car, so they wait for their husbands to pick them up and take them home."


The bus driver hears this and says, "Lady, why are you lying to your son?" Then he turns to the boy: "Those are hookers kid, they screw men for money."


The boy is silent for a moment, then turns to his mother and says, "Mommy, if those hookers have kids, do they become hookers too?"


And the mother replies, "No, they become bus drivers."