Sometimes I wish I had the memory of a dog. In some ways, they never forget; what cabinet you store the treats in or where the leashes are kept.
In other ways they are experts in amnesia.
After sitting at home all day long while you were at work, they hold no grudges or direct any hostility towards you for leaving them couped up all day long.
They just want to Love you up with the time they have.
We can all learn a little something from that I suppose.