"Mine is a very matter-of-fact approach to the problem. If you can select a population and they're educated and they're properly brought up, then you don't have to use too much of the stick because they would already have been trained. It's like with dogs. You train it in a proper way from small. It will know that it's got to leave, go outside to pee and to defecate. No, we are not that kind of society. We had to train adult dogs who even today deliberately urinate in the lifts."