A man follows a woman out of a movie theatre. She has a dog on a leash.

He stops her and says,
"I'm sorry to bother you, but I couldn't help but notice that your dog really seemed to be enjoying the movie.

"He cried at the right spots, he moved nervously in his seat at the boring parts, but most of all, he laughed like crazy at the funny parts. Don't you find it strange?"

"Yes," she replied, "I found it very strange. He hated the book!"