I once caught my mother taking out the various pieces of broken cookies left in their container after all the whole cookies had been eaten and attempting to fit them together to make them into a whole cookie again. I broke her concentration by asking her what she was doing. When she didn't answer and kept her head bent over her cookie pieces, I started to ask her why she was bothering to try to piece them together. Why doesn't she just eat them as is?
Hearing the judgement and ridicule in my voice, she raised her head quickly to aggressively bark, "Just leave me alone!"
I turned from the kitchen in amazement and sidestepped my way through the maze of debris back up into my room.