[stick-figure children's book in progress; trademarked, consummated, copyrighted, taken in vows, this day, Dec. 20, 2011 CE]
Why do I have to wash my hands?
Because you're a smelly kid.
And I'm a smelly adult.
And smelly is our nature
Until we wash it out
And why can't I be a smelly kid?
Because
Kids don't like the smelly kid
Adults don't like the smelly kid
But germs LOVE the smelly kid
The smelly kid with dirty hands
Makes people puke and people cough and people (like parents) get red hot
And sometimes die....
[& so forth]