Take this example for instance:
I had friends come to visit with their children. I'd make a nice lunch for them, usually a plate of spaghetti, and the children would enjoy the meal. Pasta on the table, in their laps, on the floor, on their hands, all around their faces, making them resemble Ronald McDonald. Children seem to get more food everywhere else than in their tummies.
At the end of the meal I'd say, "Ok, everyone wash your hands." My children would comply while their children would say NO! I'd have to get up and go over to them and take them to the bathroom and do the washing and drying of their hands for them (while the parents said and did nothing). Then I'd clean up all the spilled pasta and wipe down the tables, floors etc.
Their NO to my request tells me a few things:
