Movie dog

A man follows a woman out of a movie theater. She has a dog on a leash. He stops her and says:"I am sorry to bother you, but I couldn’t help but notice that your dog was really into 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 that unusual?" "Yes," she replied, "I find it very unusual... He hated the book!"