The teacher has just reminded the whole class of the principles of good hygiene, and suddenly, in the playground, three kids boast about the cleanliness shown by their parents.
"Well, my father," said one of the boys, "he's so clean that he takes up to three showers a week.
- Well, that's bad, said the second. My father, he takes a shower every morning!
- Wow, eh! boasts the third. Mine, father, he is so clean that he never needs to take a shower!