‘A woman went to get a taxi with her son at the Isle of Dogs.  At the street corner it was all whores hanging around waiting for trade.  “Mum, mum: what are all those women doing?”  Mum was embarrassed, but quick-thinking: “I expect it’s the sailors’ wives waiting for their husbands to come back from their ships.”  The taxi driver leaned back: “Don’t give him any of that shit, love.  They’re whores, that’s what they are.  Whores.”  The boy says, “Mum, do whores have babies like normal women do?”  “Of course they do, Tommy.  Where do you think taxi drivers come from?”’