Last night, about an hour after he went into his room to go to bed, Youngest Son came out. He was sobbing and saying "come on." It took me a while to realize what had happened. I had told him to go to his room and I'd come and read him a story in a few minutes. I got distracted dealing with Middle Son, and then it had been 15 minutes and he hadn't come out, so I assumed that he had fallen asleep.
I was wrong. He was awake and waiting. And waiting. And waiting. Once I figured out what had happened, I apologized profusely. Daddy is very sorry to have kept you waiting--I thought you were asleep.