Finally, when he said he was done, I came in and found that he had scrunched up about 15 balls of toilet paper and arranged them neatly on the counter. He had used up at least half a roll.
He said, "Look, Mom. Look what I did."
My first thought was to chide him about it, but I opted for a less confrontational route (for once). "Wow, what are all those for?"
He looked up at me and smiled magnanimously. "They're for our guests."
We were having a potluck that night and had lots of people in the house.
I suppose there are worse things he could be doing while pooping.