The captive learns comfort from its captor.
In the park-like grounds surrounding the Temple of Heaven in Beijing there are several areas where people gather socially. Among the things one might see would be various musicians playing, artists demonstrating their talents and organized exercise, something like line dancing.
There was a small crowd gathered around the man who was holding up a cage with a bird in it. I'm not sure exactly what was special about the bird, or the man, but the social dynamics were quite interesting to watch. I kind of assumed that the bird had been trained in some manner, perhaps to sing or to talk.