You said "negotiate" and it's funny... less than a week ago we were putting my son to bed, and our routine naturally includes reading a few books right before we nurse. He gets to pick the books, so often we tell him, "Okay, just one more." Well, we had read 3 books that night and we were telling him, "Okay, time to go to bed." He looked me in the eye and held up one finger, shaking his little hand for emphasis. Well, we just had to acquiesce!