December 05, 2012 7:38pm bringing out the animal impression of being a satisfied Person.
In this case, "He" the person is represented by the action of a grooming cat, of which we all know that this is a behaviour that only occure after a satisfied and filling meal (could imply other types of pleasure as well).
No matter wither it is the feeling of Love, Anger, or even Joy. Sometimes thse simplest emotions will resonate the most.