So this girl dog has a rather reasonable hat in the beginning but she goes fishing for compliments and the dog she is obviously flirting with tells her honestly "I don't like your hat." This is the equivalent of saying "I'm not buying you a drink. Go hit on somebody else."
But the chick doesn't take a hint.
She goes and gets a new hat, which of course the boy dog doesn't like. She chases him through the book, trying to change herself a little each time so the next encounter will have a different outcome.
And what happens? They meet up again at a party. A dog party. Have you seen what is going on up there in top of that tree? No good, I will tell you that. So the boy dog, who obviously sees an easy conquest ends up giving in after who knows what he's indulged in at the party. And what happens? They go home together, as though this is a good thing. Riding into the sunset? Lets not even touch on the fact that he isn't taking a cab after that party.
The unwritten ending? Nothing but heart break.
This book is telling young girls to keep chasing after rude boys until one day they decide to take you home for a night.
PD Eastman, what are you doing to our daughters? I think the only right answer to this is that I take the book out of my house so I am never forced to read it, I mean, never have to expose my daughter to it again.