Living on the streets of Puerto Rico, Charlie apparently learned a thing or two about dog training. Here's a little video of Charlie applying the principles of operant conditioning to teaching Tigerlily. Tigerlily has a toy, and Charlie wanted it. Street life (and genetic survival of the socially fittest) in Puerto Rico apparently led Charlie to understand that it was in his best interests not to challenge other dogs for their interesting stuff, but instead , to practice the fine art of cajoling. Look how well Charlie is able to cajole Tigerlily, and this is just hours after their first meeting!
Source: http://clickertraining.com