Aaron came in one day from playing outside and he was filthy. I told him to go upstairs, take off his shirt and pants, and throw them in the laundry. I told him to then fill up the washbasin and give himself a thorough wash. He was gone a long time. When he finally appeared, he was wearing pyjamas but he looked as dirty as ever. I asked him if he had washed himself and he told me to look at his face. Around his mouth was a circle of clean, pink face. He had licked off the dirt for as far as his tongue could reach.