My mom's words of wisdom for the parents of eighteen year olds is "just because they tell you they're not listening doesn't mean that they didn't hear you say it."

My own take on this, recently, to a nineteen year old nephew, is that the difference between nineteen and forty isn't intelligence, it's experience. The forty year old has already pulled that dumb stunt and remembers how not to do it again.

At least, most forty year olds. [grin]