Politeness costs nothing

Today, The Ugly Volvo posted an Open Letter to the Female Hat-Wearing Dog From Go Dog, Go that's pretty much perfection. Even as a small child, I remember being appalled by the hat-rejecting dog's rudeness. Didn't his parents ever teach him about the value of a polite redirect? Those conversations should have gone like this:

Dog With Hat: Do you like my hat?

Yellow Dog: ...it's a great shade of blue!

MANNERS.