I had to get up at 3:30 in the morning to get ready and then come to Philadelphia airport, where I am right now in the renovated F terminal (looks good!). Well anyway, I watched my cat in the litterbox and realized that while she is lazy about burying her poop, she is diligent about making sure no one can smell her pee. Now she watched me look at her and had that momentary look. I thought it was shame. I thought it was remorse. When she narrowed her eyes and began to purr, I realized that in fact she was worried I smelled her pee. Shame and remorse were human emotion. She just cared about the the pee.
There is a lesson there, I know it.