There was no chemical change for me either, but it's weird to think the world revolves around my child. It doesn't. As parents we have responsibilities, and we try to make sure our child lives a balanced and peaceful life, but I don't spend every minute of non-work time doing stuff for my kid. Neither am I unhappier that I have a child to take care of, nor am I enthralled about it. It's just a part of my life man.