Ah, well, that explains why I didn't get the joke. As a therapist who uses cognitive behavioral techniques every day to help people change their behaviors, I see a LOT of similarities between training dogs and training people and even use dog-training metaphors to explain how you can reinforce a (child's / spouse's / etc.) behavior negatively or positively. I talk all the time about how Mike is such a great husband because he is so readily trainable, among other reasons, of course!