It occasionally becomes clear to me that children are savages, heathens, in need of civilisation. Sometimes the civilising process is a gentle one, with patient reminders and celebrations of accomplishments. That doesn't always work, though. The other day, I walked into the kids' bathroom, and realised that they have been wiping their hands and faces (their filthy, dirty, make-upped hands and faces) on the white shower curtain.
I'm not sure if this will have the effect I hope for, but at least it amused the children... and, more importantly, it amused me.