A mother and her small daughter, were in a not particularly nice area of town. They were waiting for a bus, when her daughter noticed several wildly dressed women who were loitering on a nearby street corner.
The bus finally arrived and they both climbed on, at which point the young daughter asks her mother, "Mummy, what are all those ladies waiting for by that corner?"
The mother replies, "Those ladies are waiting for their husbands to come by and pick them up on the way home from work."
The bus driver, upon hearing this exchange, turns to the mother and says, "Ah, come on lady! Tell your daughter the truth! Just tell her...... they are prostitutes!"
A brief silence follows, and the daughter then asks, "Mummy, do the prostitutes have any children?"
The mother replies, "Of course, dear. Where do you think bus drivers come from?"